I am using a Saito 120 with a 15 X 5 prop. The prop is probably a little too long for the airplane. The engine really works great in the plane. I would suggest you go with a 4 stroke, perhaps a magnum 120. A magnum 91 will work but may not give you the power you need for the plane.

I did leave the wooden engine mount on, but I did you fiberglass sheets and epoxy to strengthen the mounts which seems to work great. I did modify the elevator but using a double pull pull system. It actually works great and you don't have the problem of the rods rubbing on the fuse. I also get another 1/4 inch out of the elevator. What I did, I took a wooded rod and put a servo arm in the middle and two servo arms on each end. Then used hard wood inside the plane for the rod to move on. The middle servo arm is attached to the servo using a 24 inch metal rod in tube, then the outside servo arms attach to the elevator in the normal way. It's works great so try it.

It's a great ariplane to fly and but does have a tendency to go into dives when doing flat spins or such. You will need every bit of elevator to pull the plane out of the dives. I lost my first plane that way and have gotten into trouble with the second one, but have learned not to push it and make sure you have room for recovery. Other then that, it's a great flyer and very stable.

H