So Derek, you have a Nak BX1?
Did you rebuild that one too?
I have one that just isn't getting traction from the centre little drive wheel when it's trying to engage the front or rear spindles. (the little flipper wheel)
I'm thinking the little spring needs to be replaced. If you know the one, then you'll understand my dilemma. Where on earth do you get one of THEM from? It's tiny as.....
I've been scouring other broken decks etc I have here, but no luck.
I got too frustrated with it eventually, and chucked it in the 'too hard' basket for now. I will get back to it one day I s'pose.