ive been doing a little research into the cam and prop stuff for a c90 in a pa18lite, in univairs book they sortve seem to recommend for a climb prop for this weight airplane to use a 1b90cm7146 mccauley, the b model is a clip tip, the a model is a rounded tip, i dont know what effect a rounded would have over a squared end. the sensenich there chart seems to point to 76ak-2-42, in the wood sensenich im coming up with a 76ck-38 for a climb prop or a w72gk-48 for a standard, has any one out there had any experience with that 76-38 wood. on what ive listed above here, is whats in the back of univairs catalog, go there and see what you come up with. on the cams here are some of the continental numbers ive come up with for the c90, 531076, 531146, it would be nice to see a chart on lifts and durations, for the 0-200a and b there listing 628421 and 643067. i think with either the props or the cams you would have to aplly to your own situation. im really wondering myself about a wood prop over a metal, some guys tell me that if the plane is stored inside thats the way to go. id sure like to here from some experience, thats what tells the story. doug