1 want to respond to the overpropping issue.

i put a three-bladed MA 16/10 on a saito GK 80 ran it on coolpower 20%; Type F plug. Ran surprisingly well; full throttle gave about 7 k as I recall; idle was good, around 2k; high speed needle had to be set rich. Definitely had a fatter exhaust note & thrust was noticeable reduced compared to the usual MA 13/8 I would run on it. No obvious ill effects after about 6 10 minute flights.