About this 3D model
The Hobbyking X900 Tricopter is a pretty good frame, it's a shame that the motor mounts are such poor quality that they pretty much always break if you put any sizable load on them (larger motors, or a minor crash). These are replacement motor mounts for the HK900 Tricopter. I first built only the back mount, and considering it worked so well, replaced them all. Coming soon: Multicopter Legs