Jtimothya,
The BM-8 is their highest-performance isolator for loads in the 100-lb range and has the additional advantage of a low profile (about 4 in. high). I replaced the standard top plate with a 28x20x0.75-in slab of polished granite to support my VPI TNT 'table. The sum of these masses (minus the mass of the original top plate) comes just within the maximum load rating of the BM-8.
The BM-8 is their highest-performance isolator for loads in the 100-lb range and has the additional advantage of a low profile (about 4 in. high). I replaced the standard top plate with a 28x20x0.75-in slab of polished granite to support my VPI TNT 'table. The sum of these masses (minus the mass of the original top plate) comes just within the maximum load rating of the BM-8.