Hey Joe, here's an idea, I liked what we did with the "Tow Bar" thread, you can "click" once and see a half-dozen examples, maybe we can do the same with chocks. anyway, ...simple, easy, light weight, cheap, 1 1/2" PVC. Glue them just snug enough so you have to kick them out. Jim
Here's a helful tip, (assuming you made them snug), if they get harder to kick out, ...you're losing air pressure.
