Ready to RUMBLE

Have you tried taking it off the Gingko? I have a P25 and tried a Gingko and sent it back. I found a Base and AQ feet to isolate best on Regas design. You'll love the Delos by the way.

Perhaps not a direct answer to your question but here also rumble problems.
VPI Scoutmaster Signature/Benz wood SL/Nagra BPS/Quad 99 - no subsonic filter.
50% of the lp's are OK
25% are more or less OK
25% are bad
So I think it is not the system.
I don't know why people call it "subsonic" ; I can hear it very well if a record is bad.
Been looking around for some external subsonic filtre but not much choise available.
The KAB RF1 is a possibilaty but I'm not used to buying in the US (I live in Europe)and I fear that it will influence the sound.
Any advice appreciated.

KAB rumble filter. Google it. It works.