Some guys went YS 110. Some went 120 and one guy went MVVS 1.6 gasser with pipe. I stuck with old faithfull, Saito 100 but now I just hung a 16/4 APC prop on it and am itchin to get out there. I also used some Ernst thrust plates from Quantum Models. Takes all the guess work out of it and the different sizes are good for up/down thrust as well. BTW 1/8" is roughly 3 degrees. Joe

PS on the engine swap you are going to save a few oz. and realize alot more power. Swinging larger diameter props translates to more wash over the control surfaces = more control.