This is just a quick design i cam up with for a Tcopter for FPV. Everything i designed except for the rear yaw wich was made by ironman. Im still not done the design working on a gorpo mount next.

The screws i used were #6. You can print with eaither PLA or ABS i used both. Also im using 1/2' square stock but this design you can use any size for arms. Keep in mind the battery tray is for 1/2'. Hope you like it any suggestions or comments feel free to post below. Thanks