A simple frame to prevent damage to the Bitcraze Crazyflie.v1.7 - See http://www.thingiverse.com/thing:90566 v1.6.5 - This frame is similar to v1.5 with some minor alterations to the motor attachments and thicker/stronger outer rings. Attach frame to the bottom side of the plastic motor mounts of the Bitcraze Crazyflie quad and fix with foam tape (carefull do not to clip the motor wires). Fix battery between the underside of the quad board and the frame and fix with tape when quad is balanced. The battery on the underside of the quad allows for greater stability. v1.5 - Attach to the bottom side of the plastic motor mounts of the Bitcraze Crazyflie quad (carefull do not to clip the motor wires). Fix battery between the underside of the quad board and the frame and fix with tape when quad is balanced. The battery on the underside of the quad allows for greater stability. v1.2 - Attach to the top flat side of the plastic motor mounts of the Bitcraze Crazyflie quad using simple or two sided adhesive tape. Attach the battery to the frame and have fun. Print with flex PLA or nylon preferably. Enjoy.