I use the Townsend pods under my turntable and I’m very happy.
Several years ago, I bought a high mass turntable - a trans
rotor fat Bob S - and I had a flimsy small Lovan rack sitting on a sprung wood floor to work with.
The combination was particularly susceptible to footfall, my son who stomps like Frankenstein, walking past, the turntable, could even cause it to skip. Plus there is an air conditioner on the wall outside that can cause some rumble and I wanted to isolate from that too.
So I wanted to build an isolation platform for the turntable .
I spent many months testing out all sorts of different isolation material combinations . I used vibration measuring apps on my iPhone and iPad to get objective confirmation.
Absolutely nothing came anywhere close to the isolating properties of the Townsend Springs . Not sorbothane, not constrained layer damping. Nothing else.
Ultimately, I did end up with the turntable on top of a 2 1/2 inch thick butcher block , and then another layer of MDF and steel, all held up by the Townsend pods.
Without the pods , stopping my foot near the rack and with my hand on the rack, I could easily feel the vibrations and measure them.
With the Spring pods doing the same , there’s virtually nothing to feel getting to the turntable when stomping the floor, and it’s almost unmeasurable.
Sonically, I have no idea if this aids the sound , but in terms of stopping major vibrations getting to the turntable it works great.
Finally, as to the issue cited in the OP: I have no such problem with the springs being too wobbly or being excited. Certainly if I leaned on one side of the platform, it would tip because it’s held up by the springs. But other than that, wobbling goes on at all. There is zero issue interacting with the turntable either to put a record on or two adjust my cartridge or anything else. It’s a non-issue..