Thanks for your reply. My amp is underlain by an amp stand, on which are six or so vibrapodes, then a granite slab… then Nobsound springs… then my amp. The Nobsprings definitely improved the sound. I know granite can be bad under a TT, but I felt that with the vibrapods I put under the slab isolated my amp enough. But, now I am starting to wonder.
I have been trying to avoid trying it (my amp is 100 lbs and I am 70… I would just rather not… I am getting lazy). Maybe I will just need to see if the granite is an issue.