I was talking to the owner of my local stereo shop the other day about viscous damping. He said the same thing about it being too dark and taking out the dynamics. He switched to a less viscous fluid, in the form of baby oil and was very happy with the results.
What do you have in the way of isolation/shelf under your Technics? I'm trying to dial it in with mine right now. I started with a plinth sitting on vibrapods then ditched the plinth and just put the vibrapods under each foot. It's better than nothing and a bit better than the plinth/vibrapod combo.