Hobby King Fiberglass 450 Quad Battery Cradle

This is a battery cradle for the Hobby King Q450 v3 quad frame. It's made by Diatone. http://www.hobbyking.com/hobbyking/store/__54664__Q450_V3_Glass_Fiber_Quadcopter_Frame_450mm_Integrated_PCB_Version_US_Warehouse_.html
The bottom PCB doesn't allow for securing the battery very well and the opening doesn't allow for a very big battery either.
So, I came up with this. It's pretty straightforward and goes together with M2.5 12mm and 20mm screws.

This allows the battery to be mounted very