Made a quick run with the original rubber puck installed and I can say that I really miss the air spring ride. I believe the air spring isolated the road vibrations much better than the solid rubber puck. Too bad the air spring I installed wasn't able to handle the load.
I might try a lower PSI in the air shocks to see if it will make a difference or not in the road vibrations.
I've ordered a bigger single convoluted air spring (a used one fer $25 shipped from eBay) and I'll see if that will fit within the dampener section or not. The Goodyear/Enidine Y1-1B5-500 should fit and has a bigger air volume than the Goodyear Y1-1S3-013 that I used before. Since the air volume is bigger, I should be able to run a lower PSI to perform the same load rating as the smaller one.
Both the base and top mount plate of the bigger air spring are aluminum vs the plastic plates on the smaller one. I'll have to drill some extra holes in the dampener section so I can mount the new air spring.
If it doesn't fit without rubbing in the dampener section, I'll have to extend the area with some metal plate or cut down the boxed in area. I'll be consulting with a local metal fab shop if I go in that direction. I'm looking to bolt the plates in place but if I have to git them welded in place...I can have that done, too!