We did something similar with Delrin tubes and bars for our
2013 climber (
underside,
CAD shot). No rollers since the Delrin slides. It ended up being a good way to steamline the package for the pyramid skids. Be ready to demonstrate to the inspectors that you haven't modified the cylinders, however. Some RIs will pay close attention to any pneumatics they can't clearly see. (We showed them a spare.)