I spent most of the day in my brother’s shop helping him with repairs to his assembly table, pictured above. The massive casters on this table are pneumatically deployed using the stored compressed air in the canister mounted to the underside. My brother fabricated the piston components and used a rubber diaphram to serve as the actuator. One of the rubber seals failed after two years of service so he decided to replace all four with a silicon diaphram. The project took several hours to complete and produced a very satisfying result. It is very cool to throw a switch and have a several hundred pound table convert from a stationary to a mobile platform. Mark and I enjoy working on projects together and lament the fact that we live so far apart.