Bo, the motors being on the bottom wing is of no concern. I used O.S. 40 2 strokes at the time. If i were going to do another one today it would be 4 strokers for sure. The O.S. 40's proved to be plenty of power. Go for it, you will love it. Please let us know if you find someone out there that will cut the parts. I cut my own and that part of the process alone took many hours.