Got my gears installed and working. Ended up making a meaty block to hold the crank and gears. I was thinking that because it mounts to both the recoil plate and the housing it would assist in absorbing recoil. The back edge of the block comes up flush with the housing and the inside of the rear cover for further recoil support.
I am probably paranoid about the recoil but better to err on the side of caution I figure.
Mainshaft gear is attached with a key and slot in the mainshaft which allows about .050 movement each way for headspace adjustment. A needle thrust bearing is between the gear and the recoil plate.
The crankshaft gear is sandwiched between two needle thrust bearings and attached to the shaft with a 1/4-28 long setscrew through the gear and shaft. The shaft runs in oilite bearings in the block on each end.
My homemade gears work great. Only mistake was I should have put a shoulder on the smaller crank gear for the setscrew/pin. I redneck engineered it with a shoulder ring spot welded to the gear. I may remake that gear later with a integral shoulder, then maybe not LOL
