RE: Enlarging prop hole. Drill or ream?
I use the GP step reamer (7/8/10mm). Then I bought a precision 12 mm reamer for about $17. I use a drill press and let the prop float on the table, but sit flat. I just hold it with my hand. The prop never grabs and turns violently because I'm taking off so little in each step. So it's very safe. It makes perrrrrrrfect holes every time.
By the way, I have a Moki 1.80 that I've done 3 props for lately and the hole is 10mm. Then I do a 12 mm ream 5mm deep form the back of the prop. That's because Moki's shaft is 10mm on the threaded part and 12mm at the base.
Joe