Gear case slid onto the shaft nicely with no excess slack or lack thereof. Put a brand new key on the shaft as well. I even went as far as to replace the bearing and lock collar that wasn't out on the opposite side of the crank........preventive maintenance far as I was concerned. Think welding a bolt into that shaft and using a nut with lock tite would work in the future instead of a full RandR job again to replace the boltIJ I can't fathom why it wouldn't work. Didn't know what I was up against first hand when this project started. After being into it, I think this idear will work.