[nixiebunny]

We are using the pneumatic wheels on our shooter with no problems.

We made two modifications to the wheels to ensure long wheel life:

1. We balanced the wheels. We placed two 10-32 x 1.75" long screws in the hub slot opposite the valve stem, held in by foam sticky tape placed into each corner of the slot on the rim side. (Don't worry, the foam is compressed when the wheel spins up, so they don't get loose.)

2. We added a carved oak block between the valve stem and the rim to keep it from flexing when spun.

3. We support the wheel from both ends of the hub with a 3/8" bolt attached to the shooter frame, poking into a bearing pressed into the hub on the side away from the motor.

We can shoot pretty well into the 3 point goal at 50 feet. (Our testing was outdoors during a wind storm, so the average wasn't that great.)