Ordered couple of those gears from
SDP-SI, but because I had extra day off from work, I just had to get the car running. Managed to fix the broken gear by drilling & tapping a new hole for the set screw, changed the motor to
KD36-74-15XL 1100kv and was off to see if this thing could learn to fly...
Wanna see the video?
Click the picture above then.
I was pretty close to succeed in my teaching lesson, but unfortunately the front diff broke. Prolly the rear went too because the driveline was locked at the end... Transmission rolls well though.

Also one plastic spur met it's maker, because the motor shifted a bit.
Other than that I was really having fun.