Turntable isolation platform Recommendations?

@whart , excellent set up whart! Why did you add the HRS platform? I assume you ordered the MinusK platform for the weight of the turntable? Or, was it the weight of the turntable plus the platform? Technically, you should not need the HRS platform at all. 
I assume you have a symmetrical situation for the left channel? Is the system on the short wall?
For those looking at whart's system just a small note. There is now a low profile MinusK platform that is only 3 inches or so thick which makes the set up much less bulky. whart now has the best of both worlds, mass and isolation but, notice that he got an isolation platform in spite of having an ultra high mass turntable.
Whart, have you thought of adding the air bearing base? You already have the compressor so, why not?

+1 @

Yes, did use Airline Arm with Vibraplane. Never had a problem. Easy going, still own the VP, the minus-k never was my cup of tea …

https://i.postimg.cc/zfbWbFBs/C3-ACBEDE-E210-4626-ADD7-172-B8-B5-B11-F6.jpg

@syntax -thanks, noted. I remember the Kuzma Reference- had one, very easy to set up, sounded good, had a Triplanar on it at the time.
@mijostyn- I had the HRS in NY and was able to isolate the high mass table through a combination of mass loading and judicious placement of other equipment. There were some old photos of the system there I could dig out that show the table placed on a huge old Asian prayer table- we added huge chunks of sorbothane to the prayer table legs, but it was a kludge work around at best. In my NY set up, the HRS alone could not isolate footfalls and in fact, I think that some of these isolation platforms do not do that very effectively. The Minus K does.
The MinusK was purchased when I moved- to a restored Victorian house in Austin with springy wooden floors. As to adding the HRS, I didn’t like the idea of the metal turntable coupled to a metal top on the MinusK. I did speak to the owner of HRS and as I recall, he didn’t indicate any issue when I discussed using the HRS with the Minus - he did suggest I send the HRS back for a newer footer, but I didn’t bother.
You are welcome to visit if you come to Austin.
PS: on the spec of the Minus K, it takes the HRS into account and also provides me with just enough load capability to add a second arm pod (at 30 lbs). I had never ending problems trying to balance the Minus K with both arms, though. See here. Have no present plans to add the air bearing platter to the XL, but thinking about some different horns. That’s a whole other discussion! 

@whart I have my SOTA on a Stickley “ prayer table “…. ha.