We live in a 1890's era train station with a crawlspace. My current setup involves 4 holes in our hardwood floors (you should have seen the Mrs when she realized what I did LOL)...and then 4-12 foot lengths of heavy duty electrical conduit hammered into the earth, so that there is about 4 feet of conduit sticking through the floor. I then connected them together with a simple wooden top shelf. This gives excellent "give" while isolating the table from everything but the trains that run by.
I have a homemade stand, similar to the S.Org. stands many people place their tables on. I have bored a hole in the bottom and the cable from the tonearm now hangs straight down for a good 18 inches and then goes into a "J" shape, where it is zip-tied to the side of the table at the tip of the "J"...this allows for the free-est movement of the suspension. The effect must be minimal, because the bass is back to how it used to be...and then some.
If anyone knows where to buy a plug that will fit this tonearm, please let me know. I am going to make a set of cables for it to remedy this issue. I know things are compromised. Sounds good, but...