Regarding T-Hawk motor flex.

I had that problem too after some crashes I noticed that the motor mounting place, the black disk, looked warped/bent. The plastic it fastens to was also somewhat smushed. Motor could flex if you pushed on it thru the top access.

If you look at the fuselage along side of the motor you can see molded in bosses to support the motor left and right. I poked holes in the fuselage above and below one of these bosses near the middle of the motor with my hobby knife. I ran cable tie wraps thru them. I had to use two and connect them together but one long one would work OK. When tightened up they supported the motor on top and bottom and pulled the bosses firmly on to the motor. Feels real solid now.

Bob

PS I did get and install the T-Hawk model into FMS. Flys great. Wish I could fly the plane as well as I am flying the simulator.