Thanks Rick
I was advised by rotax too run the 2.62 ratio C type so that what I end up with , my old lightwing ran 3.1 C type with a 3 blade 68" warpdrive
Not shore what prop I run yet I have a 2 blade 68 " lightwing prop I will try but most likely run a 2 blade ground adjustable in the future if the old lightwing one dose not work ....