Fliteboard prop for Flipsky 65161

I found this excellent drawing by @superlefax on one of the other threads and I had three questions

  1. Can someone confirm that both the 8.1 and the 10.95 shaft pathways should be reamed out to 12mm?

  2. If so could I successfully use a hand reamer set to incrementally enlarge the hole as I don’t own a lathe or drill press.

  3. I believe the original Flipsky shaft pin is smaller than the receptacle slot in the “base” of the Flite prop. Can anyone suggest a way to use the original pin or is the size difference so insignificant that the slight play wouldn’t matter?