RE: Saito .82a
Just tried a few props on my 82.
APC 13x4W 11900 (that is within 100rpm of my YS63, probabliy a few to many revs for the Saito but it seemed sweet, mind you it is a very short stroke motor and they usually like to rev.)
APC 14x4W 10400 (liked this one)
APC 14x5N 10900 (motor seemed unhappy on this prop, was sweeter on the 13x4)
Fuel is Model Technics Dynaglo 5 (5% nitro, 8% syn and 2% castor)