Your anti-footfall solution is massively engineered and will no doubt work. Far be it from me to discourage such an innovative & effortful concept.
However, I suspect the following would work just as well. This is something I planned to do based on a product that used to be sold in the '80s (for all I know it still exists):
1 - Using any wood of your choice (3/4" thick stock or plywood), build a study open-topped box ~2 ft wide X ~ 5-8" tall 18"-20" deep (exact dimensions depend on outside dimensions of your new prime, measured from outsides of foots or other support structure). The end result will look like a wide/relatively thin box laying on one of its large surfaces--but lacking the parallel large surface to "close" the box
2 - build a sturdy 3/4" thick "floating platform" (single piece of wood) that is sized ~1.5" smaller than the outside dimensions of your open-topped box. This piece of wood will "float" on top of the box, representing an approximation of that missing top surface
3 - fill the box w/play sand to w'in ~5/8" inch of the top.
Just place floating platform on top of sand; then the Prime + any supporting footers/structure goes on top of the platform. This design pretty thoroughly isolates the outside world from the Prime (ie, any non-airborn vibration that might hit the prime from below). If the platform or structure on which this new box rests is itself well made & isolated (ie, steel cantilevered structure attached firmly to wall studs for wall-mounting)--the isolation should be quite good overall.
However, I suspect the following would work just as well. This is something I planned to do based on a product that used to be sold in the '80s (for all I know it still exists):
1 - Using any wood of your choice (3/4" thick stock or plywood), build a study open-topped box ~2 ft wide X ~ 5-8" tall 18"-20" deep (exact dimensions depend on outside dimensions of your new prime, measured from outsides of foots or other support structure). The end result will look like a wide/relatively thin box laying on one of its large surfaces--but lacking the parallel large surface to "close" the box
2 - build a sturdy 3/4" thick "floating platform" (single piece of wood) that is sized ~1.5" smaller than the outside dimensions of your open-topped box. This piece of wood will "float" on top of the box, representing an approximation of that missing top surface
3 - fill the box w/play sand to w'in ~5/8" inch of the top.
Just place floating platform on top of sand; then the Prime + any supporting footers/structure goes on top of the platform. This design pretty thoroughly isolates the outside world from the Prime (ie, any non-airborn vibration that might hit the prime from below). If the platform or structure on which this new box rests is itself well made & isolated (ie, steel cantilevered structure attached firmly to wall studs for wall-mounting)--the isolation should be quite good overall.