OK guys, great comments, I see I may have some concerns to address:
1. I'm curious to see just how noisy these will be. Stable Load now uses metal inserts in a swing frame mounted to the spring. That would see to make more noise than plastic or rubber. Anyway, I'll try them on a short trip and see how it sounds.
2. Mechanical retention - Ya, I know, it could be a problem. I thought about drilling the bolt and inserting a retention screw to hold the puck in place. I'm not too keen on that approach since this area of a vehicle is not too friendly to screwed things, i.e. rust, dirt, etc. Plus, vibration could loosen the holding screw. I thought of using a bit of Locktite on the threads, but If I want to remove or change the puck, it would be hard to get out of there.
The way I set these pucks makes it very hard for them to come loose. I pressurize the airbags until the upper spring pack just touches the puck & overload spring. So, the puck can't escape the spring pack until the camper is unloaded.
Here's a couple more photos of the puck in place:
What I could do I guess is drill the end of the bolt (the bottom) for a 1/4-20 screw that would then hold the puck to the overload spring (and use some Locktite). I would use stainless bolts and screws in the modification.
