I don't know if this is possible in your particular situation, but I bought a wall mounted audio shelf. I had the same problem, and now it never ever skips. It's not very fancy, but it does the trick. It's a steel frame (black) with a black plank of wood resting on small spikes. If you want additional isolation, I suppose you could always put the Townsend thingy on the shelf.
Isolation for turntables
I'm looking for some ideas on how to keep my turntable on the straight and narrow. My Oracle Delphi IV/SME345/Grado Reference is not in the ideal environment. I had a custom oak stand built for my gear and certainly blends well with the decor. Trouble is, my listening room has an oak strip hardwood floor, slightest footsteps makes the cartridge jump. Ouch. I bought a Townshend Seismic Sink HD and slipped it under the 'table, no real improvement. So, I'm going to sell the Sink and get something else, question is, what can I use to keep my rig from bouncing around? Thanks in advance for any and all suggestions, Jeff