Alternative for VPI springs?

Squash balls. Make your own platform(s) and it all costs almost nothing, or use Ginko.

Rpfef: Yes, I have years of experience and am currently using mine. While all of the above posters who have used a lossy rubber or sorbothane type of interface, receive some sonic benefit, these do not result in the optimum performance this table is capable of so it isn't the "cat's meow". The best way is a "direct drain path outward" for vibrations/resonances to dissipate completely. These other options don't meet that critical criteria. I think I posted some of it early on the ET thread.

(Years ago, I also) made a set of "helpers" that I use in order to extract the plinth from the base for easy maintenance and so-forth.

If you are interested, private message me for more info.

Melm: Tried it... no comparison to my set-up.

Rpfef: I sold my SIMS Navcomes years ago because of my posts above. All of these types of products do help in a way but TRAP resonances.