You could to talk to the shop where you purchased your TT. They may have some experience with the problem and can make some suggestions. Same with their distributor (MoFi).
If your TT is stock, those look to be pretty basic feet and most any form of upgrade will likely help, whether feet or a platform.
If you can feel vibs from your MA8900 then you may need want to look at isolating your speakers, which are likely the source of the feedback.
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Glenn...
Canton Reference 9 Clearaudio SM Pro Focal Bathys JLA 10" Dominion Kuzma Stabi S w/MC & MM Magnepan 1,7i McIntosh MA8950 & MR88 Oppo 203 Roon Nucleus Rose Hifi RS150B Shunyata Gemini-4 Sony ST-A6B, TA-F6B, ST-J75 & PS-X75 Sorane SA1.2 & TA-1L Stillpoints LP1v2 WW Pt, Au & Ag
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