Wanting to keep the apperance up on this one, I decided to go with 3 blade MAS 9/7 props. I will be using 2-Supertigre 40's. Are these all right for the 40's? I will normally use a 10x6 on a 40 and a 10x7 on a .45. I think the rule for 3 blade is to drop and inch and keep the same pitch. Alas, I could not find 3 blade 9x6. Do you get a better idle from a 3 blade, I would think you get better momentum. Thanks, Al