WlToys A979 DIY pan/tilt FPV mount (for headtracker)

Pan/tilt mount for runcam split.
v1: pan and tilt
v2: pan only

bottomplate for WLtoys A979 (https://goo.gl/jhxSn7)

DIY Headtracker: https://www.thingiverse.com/thing:2954807 based on
https://www.rcgroups.com/forums/showthread.php?1677559-DIY-Headtracker-%28Easy-build-No-drift-OpenSource%29
Custom firmware (BMA180 support): https://github.com/mr-pokryshkin/DIY-Headtracker

JR-style radio modules: https://www.thingiverse.com/thing:2954802