I built this set up to be an efficient 5 inch set up. i used a foxeer monster instead of a mini cam as recommended by MRM. to achieve the proper camera angle i had to sand down part of the plastic casing and part of the top plate had to be filed down. I'm quite satisfied with the results. she has a great center of gravity with or without a GoPro. i also utilized threaded nylon nuts to make the stack very short to accommodate the full size camera. this set up also is capable of swinging 6 inch props, however my ESC's and motors were scolding after one battery so i don't recommend using them for hard freestyle or racing. If you wanna see this quad in action you can check them out on this flight.

The PID's are stock raceflight one and it flys great!