Huddie,
Did you replace the kickstart quadrant or the cog it mates with? If one or the other, or both, are of the variety with flat-top teeth, the kickstart lever will be tight. Doesn't quite sound like that is your problem unless you have honed out the outer bush so much as to compensate for the distance beween gear centers. When I replaced my quadrant, it was because the inside end of the quadrant spindle had broken off in the bush. This happended because I kept starting up while the outer bush was so loose that the spindle wasn't close to running perpendicular to the inner. Amazingly, I was able to start up a few times before fracturing the outer gearbox cover. I learned about the flat-topped teeth having bought one such and having it not work.
Good luck. I must say, you are showing your A10 loyalty quite nobly, considering the various troubles.
Richard L