If you look at how the Minus K works, the chassis of the device itself is quite massive (I have the big bench top version). There are these vertical upside down pendulums that are holding the inner suspension in place but allow it to sway and the spring pushes the suspension plate from the bottom. It’s a pretty ingenious design, but is costly and has its detractors who prefer other methods.
I guess my point is that it is not simply a set of springs.
A used Vibraplane is always a sort of cheap possibility (a fresh air compressor from Silentaire will set you back under 1k US new, maybe even less if refurbished with warranty). My biggest concern (which @Syntax said was a non-issue) was that the Vibraplane would require me to constantly readjust my Airline linear arm when the platform rebalanced itself on the automatic/compressor models. There are, I believe, models that allow you to manually pump the air bladders as well.
After some discussion, I found that the Herzan wasn’t really meant to address footfalls and required a pretty solid foundation to start.
Barry Diament (sp?) was a big advocate of the bicycle tire inner tube in a homemade plinth approach-- never tried it.
I guess my point is that it is not simply a set of springs.
A used Vibraplane is always a sort of cheap possibility (a fresh air compressor from Silentaire will set you back under 1k US new, maybe even less if refurbished with warranty). My biggest concern (which @Syntax said was a non-issue) was that the Vibraplane would require me to constantly readjust my Airline linear arm when the platform rebalanced itself on the automatic/compressor models. There are, I believe, models that allow you to manually pump the air bladders as well.
After some discussion, I found that the Herzan wasn’t really meant to address footfalls and required a pretty solid foundation to start.
Barry Diament (sp?) was a big advocate of the bicycle tire inner tube in a homemade plinth approach-- never tried it.