diff --git a/src/runner/instance.rs b/src/runner/instance.rs
index 222201a..f1fca3b 100644
--- a/src/runner/instance.rs
+++ b/src/runner/instance.rs
@@ -429,18 +429,22 @@ impl ClassMethods<'_>{
 
 /// A virtual property pointer definition shorthand.
 type VirtualPropertyFunctionPointer=fn(&rbx_types::Variant)->Option<rbx_types::Variant>;
+type VirtualPropertyFunctionPointerMut=fn(&mut rbx_types::Variant,rbx_types::Variant)->Option<()>;
 const fn vpp(
 	property:&'static str,
-	pointer:VirtualPropertyFunctionPointer,
+	access:VirtualPropertyFunctionPointer,
+	access_mut:VirtualPropertyFunctionPointerMut,
 )->VirtualProperty{
 	VirtualProperty{
 		property,
-		pointer,
+		access,
+		access_mut,
 	}
 }
 struct VirtualProperty{
 	property:&'static str,// Source property name
-	pointer:VirtualPropertyFunctionPointer,
+	access:VirtualPropertyFunctionPointer,
+	access_mut:VirtualPropertyFunctionPointerMut,
 }
 type VPD=phf::Map<&'static str,// Class name
 	phf::Map<&'static str,// Virtual property name
@@ -449,13 +453,26 @@ type VPD=phf::Map<&'static str,// Class name
 >;
 static VIRTUAL_PROPERTY_DATABASE:VPD=phf::phf_map!{
 	"BasePart"=>phf::phf_map!{
-		"Position"=>vpp("CFrame",|c:&rbx_types::Variant|{
-			let c=match c{
-				rbx_types::Variant::CFrame(c)=>c,
-				_=>return None,//fail silently and ungracefully
-			};
-			Some(rbx_types::Variant::Vector3(c.position))
-		}),
+		"Position"=>vpp(
+			"CFrame",
+			//Get
+			|c|{
+				let c=match c{
+					rbx_types::Variant::CFrame(c)=>c,
+					_=>return None,//fail silently and ungracefully
+				};
+				Some(rbx_types::Variant::Vector3(c.position))
+			},
+			//Set
+			|c,p|{
+				let (c,p)=match (c,p){
+					(rbx_types::Variant::CFrame(c),rbx_types::Variant::Vector3(p))=>(c,p),
+					_=>return None,//fail silently and ungracefully
+				};
+				c.position=p;
+				Some(())
+			}
+		),
 	},
 };
 
@@ -472,5 +489,5 @@ fn find_virtual_property(
 	let variant=properties.get(virtual_property.property)?;
 
 	//Transform Source property with provided function
-	(virtual_property.pointer)(variant)
+	(virtual_property.access)(variant)
 }