 		@knob.draggable.momentumOptions = {friction: 2, tolerance: 1/10}
 		@knob.draggable.bounce = false
 		@knob.draggable.propagateEvents = false
-		@knob.borderRadius = 100
-		@knob.placeBefore(@fill)
+		@knob.borderRadius = "50%"
 
 		@_updateFrame()
-		@_updateFill()
 
 		@on("change:frame", @_updateFrame)
 		@on("change:borderRadius", @_setRadius)


		super options

		@knob.superLayer = @fill.superLayer = @
		@fill.height = @height


		@fill.width = @knob.midX

	_updateKnob: =>
		@knob.midX = @fill.width		
		@knob.centerY()

	_updateFrame: =>
		@knob.draggable.constraints = 
			x: -@knob.width / 2
			width: @width + @knob.width 
			# y: -@knob.height / 2
			# height: @height + @knob.height
			
		@knob.centerY()
			
