I still have my Killer VEE and love that plane. I would not put a .32 on it. It was originally designed for electric and the wing is built real light. If I remember correctly it had an 1\8" hardwood spar. If you put anything over a mild .25 it will be too much. The best engine I have found for it is the O.S. .15 CVA. Kind of spendy but it works great because it is light. I have flown Combat with mine as a backup (after I destroyed my frontline planes) and it stepped in and got 2 cuts for me to win the contest. I uesd a .25 FP on it then but I think a strong .15 is a better choice for sport flying. I am at 5200' altitude in CO as well so if it works good up here it will work even better lower. Good luck.