I am using a 13x7 APC on the saito 90r3 and a Xoar warbird series 22x10 3 blade for the ums 7-70. There you go. -Tom

Oops, forgot to explain fuel! I use 15% nitro 16% synthetic/with a small amount of castor (the way Wildcat makes it) and dilute with methanol 1/1 resulting in 7.5% nitro and 8% oil.