Sorry it took so long to get back-A friend is going to give me a couple 8x4 MAS props. This is just local club fun. I will try the 7x4 also. I don't know what this old FP will do, I don't believe it's been run much, picked it up at an auction (box full of engines) and two were new. An enya 9 and an OS 40 FP. Thanks for your help, SAT. AM I'm going to fire it up.