1/8 Beadlock Wheel Set for RC

First and foremost I would like to say this is my first project. I have no background in CAD, engineering, or design -- so if you find a way to improve on this design please be my guest.
This is a set of rear wheels for the Vaterra Glamis Uno/Fear but should also fit other 1/8 scale buggy or 2.2 x 50mm wheels.
This will fit the 50mm tires such as these:
1) http://www.redrockethobbies.com/Vaterra-Rear-Tire-Paddle-with-Foam-50mm-2-GLU-p/vtr44004.htm
2) http://www.horizonhobby.com/product