ZMR-210R parts

All 3 models have been designed for the [ZMR-210R frame](http://www.fpvmodel.com/zmr210r-210mm-racing-quadcopter-frame-kit-with-pcb-board_g1220.html) by [FPVModel](http://fpvmodel.com).

* Tail SMA mount which lets you use the [Matek tail light](http://www.fpvmodel.com/matek-tail-light-ws2812b-loud-buzzer-dual-modes_g1208.html) also by FPVModel.
* 20 degree mount for Runcam 2
* 30 degree mount for Runcam 2

This is my first Thing, I recreated (only measured the original) the Tail mount bas