While we are on the topic, what is involved in a gearbox rebuild? Mine (60a 5 speed) is a little noisy in all gears and sinchro on 1st is pretty bad. Do you just replace bearings and sinchro's and adjust somehow for wear in the gearset?
Or do you have to buy new gears if they are worn?
How specialist is it? I have built engines before and had no problems with them, but this seems like it's a fair bit more difficult.