Nice! Always fun to see things that should never work together working together

The aluminum tube in the main bearings is a new one to me, guess if you've got it torn down for a rebuild anyways it makes sense to do it that way.

Not sure how my dad made the original plate, but I know he used the intermediate plate from the Benz and the starter plate from the KM145 to get the paterns.
I was still stuck in that overpriced taxpayer funded mandatory daycare called highschool when he made it.

How's the twin disk clutch setup working, I take it the engine picks up rpm quicker with the reduction in rotating mass?