I designed these for the shop wall so I could quickly pull racks from trailer easily. In the trailer I use ENT conduit... I don't know enough about the different materials and their properties to trust them in a dynamic environment.
grainger sells them as well.
https://www.grainger.com/category/hardware/mounts-and-vibration-control/cylindrical-vibration-isolators?sst=4&ts_optout=true&searchQuery=rubber+isolators&categoryIndex=1
Had some time and wanted to make better use of my racks in the trailer and shop. Designed and printed these mounts for the shop.
https://www.thingiverse.com/thing:6492191
You get what you pay for... The TFL starters dont have a solenoid so all the amps go through the switch causing them to burn out. The motors themselves are also prone to burning up. Some guys get a few weekends out of one some a couple years... My shortest life was 4 starts of a .45. They denied...
Swimming is a lot more taxing than people realize. It's not the same as playing in a pool or floating in a lake. Without good form swimming even 100 yards be can exhausting. Folks will get exhausted, panic, and forget to float..