Wheel Scale
One of my Porsche projects was a "wheel scale"...a tool for weighing each of the wheels on a car to be sure that they each support the car equally (side-to-side). I did this years ago...notice the surface rust on the finger? It uses a "Porta-Power" hydraulic cylinder to lift a steel finger that is inserted into the center of each wheel. I had to make a special insert for the front wheels of the 914, because the bearing cap pretty much fills the hole and there was little room for the finger to be inserted. The insert fits into the center hole of the wheel and straddles the bearing cap.
Wheel Scale (18 kb) Wheel Scale w/ 914 Front Adapter (18 kb) Closeup of the Adapter (13 kb)