This is a motor mount design for the Turnigy B2040-4850, in order to fit in a Zagi Wing.You can make holes and screw down the motor to the mount if you want, but its not really needed, the pressure of the fit already holds it on place.Btw, you can use this mount desing on a whole bunch of different inrunner motors by scaling it to right size.Cheers,Antonio SantosJust print 2 off the mounts, and place one on each end of the motor. Then make one hole on each side of the mount base, and screw it down on the zagi wing with a washer.Have fun!