A generous AS member is sending me a good used carb box/rear handle assembly complete with trigger parts. Thanks my brother!
Good deal. The 650 and 750 have that decomp lever/ throttle lock and the smaller saws don't have decomp, and the action works differently on the throttle lock. Switching them might have been complicated. You got the best solution. Good for you that the top part of the handle assembly does break as often as the bottom part. The bottom piece is really tough to get.