GrX115 Toothpick-Like Frame

##**DISCLAIMER ;-)**
This is my very first *complete* design (from CAO to flight), please forgive any inconvenience or weakness of it!

##**LONG STORY SHORT...**
- Had a Beta75X HD, flew nice, but crashed and burnt FC.
- Bought F405 AIO 20A V3, but didn't properly fit in original whoop frame (thickness conflicts with Turtle V2 connector).
- Wanted to try it as a toothpick-like, not knowing what to expect, but wanted to try. So...
- Designed my own base plate.

And... here it is!

Do not known if it will last really long, resist to crashes or whatever, but was fun to design, print, and adujst.

##**DESIGN POINTS**
Had these items in mind...
- accept Beta75X HD guts, motors, pod with Caddx Turtle V2 and VTX as they come ^^
- reuse exact HD pod holes and screws positions to ease (un-)installation. -- May do the trick for Hx100 pod also?
- be fairly rigid, with 4mm thick arms and true X
- let connect USB cable to the bottom of the FC
- have room for motors connectors