I put an OS GT 15 in my grandsons T Clip. Way overpowered but fun. I also soft rubber Iso mounted the engine. I have a 14x8 on it. The soft mount and stock muffler make the model super quiet even close up.

The plane is short coupled and will ground loop in an instant if you let it. Take it easy on the take off and accelerate it smoothly and you won't have problems. It flies well and is a good trainer for my grandson.