DIY headtracker box

Box for flight contoller board (Arduino based board - Crius Multiwii SE). Used as DIY headtracker. Suitable for other boards with 35 x 35 mm mounting holes.
Original thread: https://www.rcgroups.com/forums/showthread.php?1677559-DIY-Headtracker-(Easy-build-No-drift-OpenSource)
Custom firmware (BMA180 support): https://github.com/mr-pokryshkin/DIY-Headtracker

WLToys A979 with camera and headtracker (review in Russian): https://mysku.ru/blog/china-stores/63831.html