I was a bit surprised at how narrow the range of peak performance is.
Sorbothane has to be loaded to work well, then it is the best vibration damping material there is. The chart linked in OP is the best guide. It is surprising how much weight they need to work correctly. 3-5 small dots under a heavy CDP is correct. There are 3 different harness to make loading easier.
Products like AudioQuest Q footers are too big for the purpose they are marketed, isolating shelf components that aren't heavy enough for the large Q footers, imo.