About this 3D model

I don't know how it compares with the DJI F450. This was designed from a high resolution picture of my original top plate. It should be perfectly symmetric. I cut it in a 1mm thick aluminum sheet and it makes a great replacement for the original fiberglass top plate that I broke when I crashed my quad. The details of the quadcopter build are at http://nicolas.aimon.fr/2014/05/20/quadcopter/ The additional four holes are to mount a multiwii flight controller like the hobbyking 328p, with 45mm spacing between mounting holes.