Collin, that looks great !
I think your redesign of the clutch drum is very sensible. It will be much stronger than the original which was obviously too fragile judging by the brazed repair where the centre had been ripped out of it. That reduced the cooling venilation area to less than yours and it evidently worked so I think you probably have a better cooling / strength compromise than the original, plus it was easier to make.
I can't wait for the next installment...
David
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