RE: which motor?
Yeah, I did convert to tail dragger and I used bigger wheels.
I wouldn't recommend the tail dragger conversion for this, though. I thought it would be strong enough with a piece of ply epoxied to the sheeting just ahead of the wing, and nylon bolts run to blind nuts on the ply battery tray, but it was easy to knock off that chunk of the fuse until I installed some balsa spacers between the bottom sheeting and battery tray, and replaced the first couple inches of soft balsa sheeting with ply.
Solid now and flies nice, though, but I'd buy one of the similar tail dragger arfs if I were to do it over again.