I have flown the VMAR version using a TT 61 PRO swinging a 12X6 prop. No need for extra weight in the nose with this engine. The plane flew at 1/3 throttle once it was airborne. The plane is squirrelly, like the previous posters have said, with characterisitcs much like the real airplane. If you try and force it to take off before it is ready, it will lift off, then set back down and continue to bounce along then become airborne. When landing it, keep a little throttle in it, and don't chop the throttle and try to float it in, Hwne you stall, the tail loses it lift, probably being blocked by the wing at the AOI increases. This causes it to lose all the elevator effectiveness and she drops like rock. The first time I did this I broke the fiberglass landing gear strut and a call to VMAR got me a new one. In the air at 1/3 throttle (with the 60) she flows around and is very gentle. The flaps work well, just don't get too slow. The high T-tail is a unique feature to this plane and takes a little getting used to. The overall quality is pretty good. The plastic parts don't match the covering exactly. The fiberglass cowl is of better quality than most of the other VMAR kits.
Tommy