Hello
The wagon in the AVI I built for my grandson, it has disc parking brakes on the rear, the tires and rims are from a golf cart and are 22" x 12". It has a 12V system to power remote control led lights that are under the wagon body. It has shocks and sits roughly 34 inches high, and it has a canopy that I bought from Radio Flyer to keep him from getting to much sun. My wife had me add the bracket on the back for an ice chest so they could take drinks etc. when they were out and about. It was a fun build and is a real attention grabber. I also made him a hot wheels/ matchbox car display from an old Radio Flyer wagon body, it holds around 85 cars and hangs on the wall.
The brackets for the air compressor, the manifold, pressure switch and 3 filling stations are all welded to the frame. I was going to bolt them in but figured removing material for bolt holes would be worse than adding material from the welds, also figured the head was minimal, so changing the physical structure of the metal would be minimal. Didn't want to compromise any structural integrity.