Four years later and I'm ready to start the build. I've reread this forum, and have some thoughts. Light is good. Enough power will be fine. I'm usings TT .15GP. It sounds like it's a blast to fly. Build it, fly it, and have fun. Anyone want to add thoughts about your "Wonder" feel free to post, and pictures are a good also. I think there's many ways to build one of these, it seems to have a fairly wide envelope in it's design. Just look at the different models Bruce Tharpe shows in the manual. I think it's a winner and think this is going to be fun.