FT Mini power pod firewall for quad motors

This is a set of firewalls designed for mounting a race quad motor on the FT mini power pod. One has a 16mm x 19mm hole pattern (for 220x size motors). The other has a 12mm x 16mm hole pattern (for 180x size motors). The firewall is 4mm thick, both for strength, and so that typical mounting bolts should be the correct length.

Sample picture shows a 2204 motor mounted to firewall.

Sept 21, 2017: Added a version with a 12x12mm hole pattern to fit motors like the [RacerStar BR1806](https://ww