This is a 30.5mm spaced mounting plate I designed for my HobbyKing Trifecta frame. This plate allows you to mount standard sized flight controllers and PDBs to create a neat flight stack. By default the Trifecta comes with a non standard flight controller mount which you are supposed to install on the tricopter with some foam tape. If you want to install a Naze, F3 or a CC3D you need to purchase a seperate mounting plate. You can also print this one...

Print in PLA or ABS with 80% infill for extra sturdiness.

I Added an STl with 5mm studs and one with 3mm. If you want a different height you can specifiy so in the scad file.