According to HH, they have only had 1 person that reported the gear actually touching the fet on the servo...the guy at HH said you can't get a piece of paper between the gear and the fet, but they don't touch...ok, that's still too close in my book, but oh well. The slack in the shaft? I know that the tail gear box wasn't pushed all the way on with my heli...I got it pushed all the way on, and I put a tiny dot of CA to keep it from sliding back, and I haven't had an issue with that since...To me, this is a better heli to learn on than the NcpX...more stable. I flip my nano- and it takes about 30-40 feet of space to get it back under control...right now...newbie at flips :P Still can't hover nose in for more than a few seconds, but I sure can flip this thing!! I'll tame down the Nano for inside flying...but this heli...have I mentioned I love it?