I have a GP At-6 Texan with a Magnum 91-fs. I also used the retract gear from tower ( $19 bucks ) . I fly from grass and pavement, The thing you realy need to do first is add Tri braces on top of servo tray with e-poxy to secure. Mine came loose after a gallon of fuel through it . It went in hard , But the only thing I realy lost was the center part of the wing .I seen it goin down so I closed the wheels up . With right ,and down thrust it flew good. It would cutup like most funfly planes on high rates.I realy need to find one that has been crashed that maybe the center part of the wing can be saved. If you know of one I WILL BUY IT Thanks Tim