actually finished this a while back but never got around to posting it. first time messing around with posca pens! will post an action vid later but the delay2 and speed knobs have LEDs embedded inside (d2 lights up when the warp button is pressed down, and the speed LED blinks in time with the modulation LFO rate). i used these clear plastic 9mm potentiometers which have a hollow shaft to fit an LED: http://smallbear-electronics.mybigcommerce.com/alpha-clear-shaft-pots-w-bushing/

delay pedal