diff --git a/src/controls/button.rs b/src/controls/button.rs
index cc317fa..bac3328 100644
--- a/src/controls/button.rs
+++ b/src/controls/button.rs
@@ -1,4 +1,4 @@
-use super::{BuilderFn, ControlRenderData, ShowWhenFn};
+use super::{BuilderCxFn, BuilderFn, ControlRenderData, ShowWhenFn};
 use crate::{form::FormToolData, form_builder::FormBuilder, styles::FormStyle};
 use leptos::view;
 use leptos::RwSignal;
@@ -31,10 +31,19 @@ impl<FD: FormToolData> Clone for ButtonData<FD> {
 }
 
 impl<FD: FormToolData> FormBuilder<FD> {
-    pub fn button(mut self, builder: impl BuilderFn<ButtonBuilder<FD>, FD::Context>) -> Self {
+    pub fn button(self, builder: impl BuilderFn<ButtonBuilder<FD>>) -> Self {
+        let button_builder = ButtonBuilder::new();
+        let control = builder(button_builder);
+        self.button_helper(control)
+    }
+
+    pub fn button_cx(self, builder: impl BuilderCxFn<ButtonBuilder<FD>, FD::Context>) -> Self {
         let button_builder = ButtonBuilder::new();
         let control = builder(button_builder, self.cx.clone());
+        self.button_helper(control)
+    }
 
+    fn button_helper(mut self, control: ButtonBuilder<FD>) -> Self {
         let render_data = ControlRenderData {
             data: control.data,
             styles: control.styles,
diff --git a/src/controls/checkbox.rs b/src/controls/checkbox.rs
index 8e97e69..f7b91f6 100644
--- a/src/controls/checkbox.rs
+++ b/src/controls/checkbox.rs
@@ -1,4 +1,4 @@
-use super::{BuilderFn, ControlBuilder, ControlData, ControlRenderData};
+use super::{BuilderCxFn, BuilderFn, ControlBuilder, ControlData, ControlRenderData};
 use crate::{form::FormToolData, form_builder::FormBuilder, styles::FormStyle};
 use leptos::{Signal, View};
 use std::rc::Rc;
@@ -26,10 +26,17 @@ impl ControlData for CheckboxData {
 impl<FD: FormToolData> FormBuilder<FD> {
     pub fn checkbox<FDT: Clone + PartialEq + 'static>(
         self,
-        builder: impl BuilderFn<ControlBuilder<FD, CheckboxData, FDT>, FD::Context>,
+        builder: impl BuilderFn<ControlBuilder<FD, CheckboxData, FDT>>,
     ) -> Self {
         self.new_control(builder)
     }
+
+    pub fn checkbox_cx<FDT: Clone + PartialEq + 'static>(
+        self,
+        builder: impl BuilderCxFn<ControlBuilder<FD, CheckboxData, FDT>, FD::Context>,
+    ) -> Self {
+        self.new_control_cx(builder)
+    }
 }
 
 impl<FD: FormToolData, FDT> ControlBuilder<FD, CheckboxData, FDT> {
diff --git a/src/controls/custom.rs b/src/controls/custom.rs
index 6555cba..44f922e 100644
--- a/src/controls/custom.rs
+++ b/src/controls/custom.rs
@@ -1,11 +1,11 @@
-use super::{BuilderFn, ControlBuilder, ControlData};
+use super::{BuilderCxFn, BuilderFn, ControlBuilder, ControlData};
 use crate::{FormBuilder, FormToolData};
 
 impl<FD: FormToolData> FormBuilder<FD> {
     pub fn custom<CC: ControlData, FDT: Clone + PartialEq + 'static>(
         mut self,
         control_data: CC,
-        builder: impl Fn(ControlBuilder<FD, CC, FDT>) -> ControlBuilder<FD, CC, FDT>,
+        builder: impl BuilderFn<ControlBuilder<FD, CC, FDT>>,
     ) -> Self {
         let control_builder = ControlBuilder::new(control_data);
         let control = builder(control_builder);
@@ -13,10 +13,28 @@ impl<FD: FormToolData> FormBuilder<FD> {
         self
     }
 
+    pub fn custom_cx<CC: ControlData, FDT: Clone + PartialEq + 'static>(
+        mut self,
+        control_data: CC,
+        builder: impl BuilderCxFn<ControlBuilder<FD, CC, FDT>, FD::Context>,
+    ) -> Self {
+        let control_builder = ControlBuilder::new(control_data);
+        let control = builder(control_builder, self.cx.clone());
+        self.add_control(control);
+        self
+    }
+
     pub fn custom_default<CC: Default + ControlData, FDT: Clone + PartialEq + 'static>(
         self,
-        builder: impl BuilderFn<ControlBuilder<FD, CC, FDT>, FD::Context>,
+        builder: impl BuilderFn<ControlBuilder<FD, CC, FDT>>,
     ) -> Self {
         self.new_control(builder)
     }
+
+    pub fn custom_default_cx<CC: Default + ControlData, FDT: Clone + PartialEq + 'static>(
+        self,
+        builder: impl BuilderCxFn<ControlBuilder<FD, CC, FDT>, FD::Context>,
+    ) -> Self {
+        self.new_control_cx(builder)
+    }
 }
diff --git a/src/controls/heading.rs b/src/controls/heading.rs
index 680cf61..1586339 100644
--- a/src/controls/heading.rs
+++ b/src/controls/heading.rs
@@ -1,4 +1,4 @@
-use super::{BuilderFn, ControlRenderData, VanityControlBuilder, VanityControlData};
+use super::{BuilderCxFn, BuilderFn, ControlRenderData, VanityControlBuilder, VanityControlData};
 use crate::{form::FormToolData, form_builder::FormBuilder, styles::FormStyle};
 use leptos::View;
 use std::rc::Rc;
@@ -19,12 +19,16 @@ impl VanityControlData for HeadingData {
 }
 
 impl<FD: FormToolData> FormBuilder<FD> {
-    pub fn heading(
-        self,
-        builder: impl BuilderFn<VanityControlBuilder<FD, HeadingData>, FD::Context>,
-    ) -> Self {
+    pub fn heading(self, builder: impl BuilderFn<VanityControlBuilder<FD, HeadingData>>) -> Self {
         self.new_vanity(builder)
     }
+
+    pub fn heading_cx(
+        self,
+        builder: impl BuilderCxFn<VanityControlBuilder<FD, HeadingData>, FD::Context>,
+    ) -> Self {
+        self.new_vanity_cx(builder)
+    }
 }
 
 impl<FD: FormToolData> VanityControlBuilder<FD, HeadingData> {
diff --git a/src/controls/hidden.rs b/src/controls/hidden.rs
index ec774f2..49139f3 100644
--- a/src/controls/hidden.rs
+++ b/src/controls/hidden.rs
@@ -1,5 +1,6 @@
 use super::{
-    BuilderFn, ControlRenderData, GetterVanityControlData, VanityControlBuilder, VanityControlData,
+    BuilderCxFn, BuilderFn, ControlRenderData, GetterVanityControlData, VanityControlBuilder,
+    VanityControlData,
 };
 use crate::{form::FormToolData, form_builder::FormBuilder, styles::FormStyle};
 use leptos::{Signal, View};
@@ -22,12 +23,16 @@ impl VanityControlData for HiddenData {
 impl GetterVanityControlData for HiddenData {}
 
 impl<FD: FormToolData> FormBuilder<FD> {
-    pub fn hidden(
-        self,
-        builder: impl BuilderFn<VanityControlBuilder<FD, HiddenData>, FD::Context>,
-    ) -> Self {
+    pub fn hidden(self, builder: impl BuilderFn<VanityControlBuilder<FD, HiddenData>>) -> Self {
         self.new_vanity(builder)
     }
+
+    pub fn hidden_cx(
+        self,
+        builder: impl BuilderCxFn<VanityControlBuilder<FD, HiddenData>, FD::Context>,
+    ) -> Self {
+        self.new_vanity_cx(builder)
+    }
 }
 
 impl<FD: FormToolData> VanityControlBuilder<FD, HiddenData> {
diff --git a/src/controls/mod.rs b/src/controls/mod.rs
index 544cb3c..0e04c0f 100644
--- a/src/controls/mod.rs
+++ b/src/controls/mod.rs
@@ -18,7 +18,8 @@ pub mod submit;
 pub mod text_area;
 pub mod text_input;
 
-pub trait BuilderFn<B, CX>: Fn(B, Rc<CX>) -> B {}
+pub trait BuilderFn<B>: Fn(B) -> B {}
+pub trait BuilderCxFn<B, CX>: Fn(B, Rc<CX>) -> B {}
 pub trait ValidationFn<FD: ?Sized>: Fn(&FD) -> Result<(), String> + 'static {}
 pub trait ValidationCb: Fn() -> bool + 'static {}
 pub trait ParseFn<CR, FDT>: Fn(CR) -> Result<FDT, String> + 'static {}
@@ -32,7 +33,8 @@ pub trait RenderFn<FS, FD: 'static>:
 }
 
 // implement the traits for all valid types
-impl<B, CX, T> BuilderFn<B, CX> for T where T: Fn(B, Rc<CX>) -> B {}
+impl<B, T> BuilderFn<B> for T where T: Fn(B) -> B {}
+impl<B, CX, T> BuilderCxFn<B, CX> for T where T: Fn(B, Rc<CX>) -> B {}
 impl<FDT, T> ValidationFn<FDT> for T where T: Fn(&FDT) -> Result<(), String> + 'static {}
 impl<T> ValidationCb for T where T: Fn() -> bool + 'static {}
 impl<CR, FDT, F> ParseFn<CR, FDT> for F where F: Fn(CR) -> Result<FDT, String> + 'static {}
diff --git a/src/controls/output.rs b/src/controls/output.rs
index 7962e16..c8f001c 100644
--- a/src/controls/output.rs
+++ b/src/controls/output.rs
@@ -1,5 +1,6 @@
 use super::{
-    BuilderFn, ControlRenderData, GetterVanityControlData, VanityControlBuilder, VanityControlData,
+    BuilderCxFn, BuilderFn, ControlRenderData, GetterVanityControlData, VanityControlBuilder,
+    VanityControlData,
 };
 use crate::{form::FormToolData, form_builder::FormBuilder, styles::FormStyle};
 use leptos::{Signal, View};
@@ -20,10 +21,14 @@ impl VanityControlData for OutputData {
 impl GetterVanityControlData for OutputData {}
 
 impl<FD: FormToolData> FormBuilder<FD> {
-    pub fn output(
-        self,
-        builder: impl BuilderFn<VanityControlBuilder<FD, OutputData>, FD::Context>,
-    ) -> Self {
+    pub fn output(self, builder: impl BuilderFn<VanityControlBuilder<FD, OutputData>>) -> Self {
         self.new_vanity(builder)
     }
+
+    pub fn output_cx(
+        self,
+        builder: impl BuilderCxFn<VanityControlBuilder<FD, OutputData>, FD::Context>,
+    ) -> Self {
+        self.new_vanity_cx(builder)
+    }
 }
diff --git a/src/controls/radio_buttons.rs b/src/controls/radio_buttons.rs
index fcc7d05..b2b0611 100644
--- a/src/controls/radio_buttons.rs
+++ b/src/controls/radio_buttons.rs
@@ -1,4 +1,6 @@
-use super::{BuilderFn, ControlBuilder, ControlData, ControlRenderData, ValidatedControlData};
+use super::{
+    BuilderCxFn, BuilderFn, ControlBuilder, ControlData, ControlRenderData, ValidatedControlData,
+};
 use crate::{form::FormToolData, form_builder::FormBuilder, styles::FormStyle};
 use leptos::{Signal, View};
 use std::rc::Rc;
@@ -28,10 +30,17 @@ impl ValidatedControlData for RadioButtonsData {}
 impl<FD: FormToolData> FormBuilder<FD> {
     pub fn radio_buttons<FDT: Clone + PartialEq + 'static>(
         self,
-        builder: impl BuilderFn<ControlBuilder<FD, RadioButtonsData, FDT>, FD::Context>,
+        builder: impl BuilderFn<ControlBuilder<FD, RadioButtonsData, FDT>>,
     ) -> Self {
         self.new_control(builder)
     }
+
+    pub fn radio_buttons_cx<FDT: Clone + PartialEq + 'static>(
+        self,
+        builder: impl BuilderCxFn<ControlBuilder<FD, RadioButtonsData, FDT>, FD::Context>,
+    ) -> Self {
+        self.new_control_cx(builder)
+    }
 }
 
 impl<FD: FormToolData, FDT> ControlBuilder<FD, RadioButtonsData, FDT> {
diff --git a/src/controls/select.rs b/src/controls/select.rs
index 43e437c..ee68c62 100644
--- a/src/controls/select.rs
+++ b/src/controls/select.rs
@@ -1,4 +1,6 @@
-use super::{BuilderFn, ControlBuilder, ControlData, ControlRenderData, ValidatedControlData};
+use super::{
+    BuilderCxFn, BuilderFn, ControlBuilder, ControlData, ControlRenderData, ValidatedControlData,
+};
 use crate::{form::FormToolData, form_builder::FormBuilder, styles::FormStyle};
 use leptos::{Signal, View};
 use std::rc::Rc;
@@ -31,10 +33,16 @@ impl ValidatedControlData for SelectData {}
 impl<FD: FormToolData> FormBuilder<FD> {
     pub fn select<FDT: Clone + PartialEq + 'static>(
         self,
-        builder: impl BuilderFn<ControlBuilder<FD, SelectData, FDT>, FD::Context>,
+        builder: impl BuilderFn<ControlBuilder<FD, SelectData, FDT>>,
     ) -> Self {
         self.new_control(builder)
     }
+    pub fn select_cx<FDT: Clone + PartialEq + 'static>(
+        self,
+        builder: impl BuilderCxFn<ControlBuilder<FD, SelectData, FDT>, FD::Context>,
+    ) -> Self {
+        self.new_control_cx(builder)
+    }
 }
 
 impl<FD: FormToolData, FDT> ControlBuilder<FD, SelectData, FDT> {
diff --git a/src/controls/slider.rs b/src/controls/slider.rs
index 4a79b57..3b3ad95 100644
--- a/src/controls/slider.rs
+++ b/src/controls/slider.rs
@@ -1,4 +1,4 @@
-use super::{BuilderFn, ControlBuilder, ControlData, ControlRenderData};
+use super::{BuilderCxFn, BuilderFn, ControlBuilder, ControlData, ControlRenderData};
 use crate::{form::FormToolData, form_builder::FormBuilder, styles::FormStyle};
 use leptos::{Signal, View};
 use std::{ops::RangeInclusive, rc::Rc};
@@ -39,10 +39,17 @@ impl ControlData for SliderData {
 impl<FD: FormToolData> FormBuilder<FD> {
     pub fn slider<FDT: Clone + PartialEq + 'static>(
         self,
-        builder: impl BuilderFn<ControlBuilder<FD, SliderData, FDT>, FD::Context>,
+        builder: impl BuilderFn<ControlBuilder<FD, SliderData, FDT>>,
     ) -> Self {
         self.new_control(builder)
     }
+
+    pub fn slider_cx<FDT: Clone + PartialEq + 'static>(
+        self,
+        builder: impl BuilderCxFn<ControlBuilder<FD, SliderData, FDT>, FD::Context>,
+    ) -> Self {
+        self.new_control_cx(builder)
+    }
 }
 
 impl<FD: FormToolData, FDT> ControlBuilder<FD, SliderData, FDT> {
diff --git a/src/controls/spacer.rs b/src/controls/spacer.rs
index b5b800d..fe7d50a 100644
--- a/src/controls/spacer.rs
+++ b/src/controls/spacer.rs
@@ -1,4 +1,4 @@
-use super::{BuilderFn, ControlRenderData, VanityControlBuilder, VanityControlData};
+use super::{BuilderCxFn, BuilderFn, ControlRenderData, VanityControlBuilder, VanityControlData};
 use crate::{form::FormToolData, form_builder::FormBuilder, styles::FormStyle};
 use leptos::{prelude::Signal, View};
 use std::rc::Rc;
@@ -19,12 +19,16 @@ impl VanityControlData for SpacerData {
 }
 
 impl<FD: FormToolData> FormBuilder<FD> {
-    pub fn spacer(
-        self,
-        builder: impl BuilderFn<VanityControlBuilder<FD, SpacerData>, FD::Context>,
-    ) -> Self {
+    pub fn spacer(self, builder: impl BuilderFn<VanityControlBuilder<FD, SpacerData>>) -> Self {
         self.new_vanity(builder)
     }
+
+    pub fn spacer_cx(
+        self,
+        builder: impl BuilderCxFn<VanityControlBuilder<FD, SpacerData>, FD::Context>,
+    ) -> Self {
+        self.new_vanity_cx(builder)
+    }
 }
 
 impl<FD: FormToolData> VanityControlBuilder<FD, SpacerData> {
diff --git a/src/controls/stepper.rs b/src/controls/stepper.rs
index 401bd5a..aa83c56 100644
--- a/src/controls/stepper.rs
+++ b/src/controls/stepper.rs
@@ -1,4 +1,6 @@
-use super::{BuilderFn, ControlBuilder, ControlData, ControlRenderData, ValidatedControlData};
+use super::{
+    BuilderCxFn, BuilderFn, ControlBuilder, ControlData, ControlRenderData, ValidatedControlData,
+};
 use crate::{form::FormToolData, form_builder::FormBuilder, styles::FormStyle};
 use leptos::{Signal, View};
 use std::{ops::RangeInclusive, rc::Rc};
@@ -30,10 +32,17 @@ impl ValidatedControlData for StepperData {}
 impl<FD: FormToolData> FormBuilder<FD> {
     pub fn stepper<FDT: Clone + PartialEq + 'static>(
         self,
-        builder: impl BuilderFn<ControlBuilder<FD, StepperData, FDT>, FD::Context>,
+        builder: impl BuilderFn<ControlBuilder<FD, StepperData, FDT>>,
     ) -> Self {
         self.new_control(builder)
     }
+
+    pub fn stepper_cx<FDT: Clone + PartialEq + 'static>(
+        self,
+        builder: impl BuilderCxFn<ControlBuilder<FD, StepperData, FDT>, FD::Context>,
+    ) -> Self {
+        self.new_control_cx(builder)
+    }
 }
 
 impl<FD: FormToolData, FDT> ControlBuilder<FD, StepperData, FDT> {
diff --git a/src/controls/submit.rs b/src/controls/submit.rs
index f429de8..78b3c0a 100644
--- a/src/controls/submit.rs
+++ b/src/controls/submit.rs
@@ -1,4 +1,4 @@
-use super::{BuilderFn, ControlRenderData, VanityControlBuilder, VanityControlData};
+use super::{BuilderCxFn, BuilderFn, ControlRenderData, VanityControlBuilder, VanityControlData};
 use crate::{form::FormToolData, form_builder::FormBuilder, styles::FormStyle};
 use leptos::{prelude::Signal, View};
 use std::rc::Rc;
@@ -19,12 +19,16 @@ impl VanityControlData for SubmitData {
 }
 
 impl<FD: FormToolData> FormBuilder<FD> {
-    pub fn submit(
-        self,
-        builder: impl BuilderFn<VanityControlBuilder<FD, SubmitData>, FD::Context>,
-    ) -> Self {
+    pub fn submit(self, builder: impl BuilderFn<VanityControlBuilder<FD, SubmitData>>) -> Self {
         self.new_vanity(builder)
     }
+
+    pub fn submit_cx(
+        self,
+        builder: impl BuilderCxFn<VanityControlBuilder<FD, SubmitData>, FD::Context>,
+    ) -> Self {
+        self.new_vanity_cx(builder)
+    }
 }
 
 impl<FD: FormToolData> VanityControlBuilder<FD, SubmitData> {
diff --git a/src/controls/text_area.rs b/src/controls/text_area.rs
index 34784ec..bd0376b 100644
--- a/src/controls/text_area.rs
+++ b/src/controls/text_area.rs
@@ -1,4 +1,6 @@
-use super::{BuilderFn, ControlBuilder, ControlData, ControlRenderData, ValidatedControlData};
+use super::{
+    BuilderCxFn, BuilderFn, ControlBuilder, ControlData, ControlRenderData, ValidatedControlData,
+};
 use crate::{form::FormToolData, form_builder::FormBuilder, styles::FormStyle};
 use leptos::{Signal, View};
 use std::rc::Rc;
@@ -27,10 +29,17 @@ impl ValidatedControlData for TextAreaData {}
 impl<FD: FormToolData> FormBuilder<FD> {
     pub fn text_area<FDT: Clone + PartialEq + 'static>(
         self,
-        builder: impl BuilderFn<ControlBuilder<FD, TextAreaData, FDT>, FD::Context>,
+        builder: impl BuilderFn<ControlBuilder<FD, TextAreaData, FDT>>,
     ) -> Self {
         self.new_control(builder)
     }
+
+    pub fn text_area_cx<FDT: Clone + PartialEq + 'static>(
+        self,
+        builder: impl BuilderCxFn<ControlBuilder<FD, TextAreaData, FDT>, FD::Context>,
+    ) -> Self {
+        self.new_control_cx(builder)
+    }
 }
 
 impl<FD: FormToolData, FDT> ControlBuilder<FD, TextAreaData, FDT> {
diff --git a/src/controls/text_input.rs b/src/controls/text_input.rs
index ea8ae34..bfc0c8e 100644
--- a/src/controls/text_input.rs
+++ b/src/controls/text_input.rs
@@ -1,8 +1,9 @@
-use std::rc::Rc;
-
-use super::{BuilderFn, ControlBuilder, ControlData, ControlRenderData, ValidatedControlData};
+use super::{
+    BuilderCxFn, BuilderFn, ControlBuilder, ControlData, ControlRenderData, ValidatedControlData,
+};
 use crate::{form::FormToolData, form_builder::FormBuilder, styles::FormStyle};
 use leptos::{Signal, View};
+use std::rc::Rc;
 
 #[derive(Debug, Clone, PartialEq, Eq, PartialOrd, Ord, Hash)]
 pub struct TextInputData {
@@ -43,10 +44,17 @@ impl ValidatedControlData for TextInputData {}
 impl<FD: FormToolData> FormBuilder<FD> {
     pub fn text_input<FDT: Clone + PartialEq + 'static>(
         self,
-        builder: impl BuilderFn<ControlBuilder<FD, TextInputData, FDT>, FD::Context>,
+        builder: impl BuilderFn<ControlBuilder<FD, TextInputData, FDT>>,
     ) -> Self {
         self.new_control(builder)
     }
+
+    pub fn text_input_cx<FDT: Clone + PartialEq + 'static>(
+        self,
+        builder: impl BuilderCxFn<ControlBuilder<FD, TextInputData, FDT>, FD::Context>,
+    ) -> Self {
+        self.new_control_cx(builder)
+    }
 }
 
 impl<FD: FormToolData, FDT> ControlBuilder<FD, TextInputData, FDT> {
diff --git a/src/form_builder.rs b/src/form_builder.rs
index 3ce29d2..a22934b 100644
--- a/src/form_builder.rs
+++ b/src/form_builder.rs
@@ -1,7 +1,7 @@
 use crate::{
     controls::{
-        BuilderFn, BuiltControlData, BuiltVanityControlData, ControlBuilder, ControlData,
-        ControlRenderData, FieldSetter, ParseFn, RenderFn, ValidationCb, ValidationFn,
+        BuilderCxFn, BuilderFn, BuiltControlData, BuiltVanityControlData, ControlBuilder,
+        ControlData, ControlRenderData, FieldSetter, ParseFn, RenderFn, ValidationCb, ValidationFn,
         VanityControlBuilder, VanityControlData,
     },
     form::{Form, FormToolData, FormValidator},
@@ -63,7 +63,17 @@ impl<FD: FormToolData> FormBuilder<FD> {
 
     pub(crate) fn new_vanity<C: VanityControlData + Default>(
         mut self,
-        builder: impl BuilderFn<VanityControlBuilder<FD, C>, FD::Context>,
+        builder: impl BuilderFn<VanityControlBuilder<FD, C>>,
+    ) -> Self {
+        let vanity_builder = VanityControlBuilder::new(C::default());
+        let control = builder(vanity_builder);
+        self.add_vanity(control);
+        self
+    }
+
+    pub(crate) fn new_vanity_cx<C: VanityControlData + Default>(
+        mut self,
+        builder: impl BuilderCxFn<VanityControlBuilder<FD, C>, FD::Context>,
     ) -> Self {
         let vanity_builder = VanityControlBuilder::new(C::default());
         let control = builder(vanity_builder, self.cx.clone());
@@ -73,7 +83,17 @@ impl<FD: FormToolData> FormBuilder<FD> {
 
     pub(crate) fn new_control<C: ControlData + Default, FDT: Clone + PartialEq + 'static>(
         mut self,
-        builder: impl BuilderFn<ControlBuilder<FD, C, FDT>, FD::Context>,
+        builder: impl BuilderFn<ControlBuilder<FD, C, FDT>>,
+    ) -> Self {
+        let control_builder = ControlBuilder::new(C::default());
+        let control = builder(control_builder);
+        self.add_control(control);
+        self
+    }
+
+    pub(crate) fn new_control_cx<C: ControlData + Default, FDT: Clone + PartialEq + 'static>(
+        mut self,
+        builder: impl BuilderCxFn<ControlBuilder<FD, C, FDT>, FD::Context>,
     ) -> Self {
         let control_builder = ControlBuilder::new(C::default());
         let control = builder(control_builder, self.cx.clone());