Almost all “racing” MultiWii derivatives flight controllers like Naze32, SPRacingF3, CC3D or Sparky, besides the same CPU family (STM32) and ability to run Cleanflight, share the same form factor: 36x36mm size and 30.5mm hole spacing.
That creates a small problem when mounting them to some bigger frames designed to fit APM, Pixhawk or MultiWii. They do not fit and require additional adapters.
Facing problem like this, I’ve designed simple 3D Printed 30.5mm to 45mm flight controller adapter.
To use, 4 hexagonal nylon M3 standoffs have to be glued into place. M3 thread is rather too small to print on most 3D printers. It’s just faster and simpler to glue standoffs than try to print threaded holes. I used epoxy glue, but hot glue also can be used if needed.