Developed my Microtech racing in the UK to allow a wider adjustment of shock angle, the hole radius is also formed to maintain the same ride height for each hole. You do have to mount the rear body post on the opposite side, but this then allows all your MTX2 shell to fit.
Available world wide from www.microtechracing.com
Please mention where you saw them!!

FRONT




REAR (notice the cut rear hubs, camber link angle, this will be a rubber tyred car)