I know this is older post, but wanted to answer your question for people searching.
The remote board and neck board uses these 2mm hex knobs -
https://www.mouser.com/ProductDetail/Amphenol-Piher/5119NE?qs=bXpVsf6NmSKJsMVQ2poi8g%3D%3D
The remote board uses 1 larger knob that I haven’t confirmed...