I'm thinking about putting twin RCV 60's on an F&F tigercat I just aquired. The wingspan is aprox 72" and the weight, minus engines & radio is about 8lbs. I understand that the RCV engines have special prop requirements and I'm wondering what 3 blade props would work well on this application. Where can I get them? Would the same props work on a Wing MFG P-38? How about 3 blade props for twin 90's on a Wing MFG B-25? I got a RCV90 and these appear to be very well made engines with great potential for scale models with their ability to fit inside the cowl!