i have a small weight thingy at home but it's not sensitive enough... i will find some way to find out. i hope it can hover that's why i went to PROFILE planes... i know this one can hover but i don't know about the engine, i didn't have any money left that's why i scratch built. and for the prop... i don't know about 11x4... last time i tried that in my super tiger 40... it spun too fast and the ball bearing can't take it can the rear ball bearing break. is that true... some guy told me at the field that it spun too fast can broke, will a 11x4 break my engine? also, would the FOX engine be enough? because last time i tried the 11x4 i didn't see a difference in thrust on my super tiger