yobrosew`I didn't want to mess with electrical stuff that day, so I got it io stich hand turning the balance wheel and then put it back on the shelf. It does have an opening for a cam. I don't have one to try out. The base does not have holes for a treadle belt. I suppose one could shape some, but I'd rather start with one alreadt dome . Like a Necchi Supernova perhaps. They have plastic plugs in treadle holes.
I don't remember if it has plastic gears or not And it isn't close tonight.