Hey Fly Lower, The 27% isn't much bigger than the Dave Patrick Ultimate and that 75 would be way to big. Goldberg makes a 30% that is made for 3.2 to 4.2. Your 75 would make a great combo in this plane. The only problem is, it's $850. The guys that do have this plane say it's worth the price. Do a scearch for the tread. I believe it was in Giant Aircraft forum.

Kelly