Dear @chakster I’ve seen you mention the AT 616 legs before.
My problem with them is that the cheapest set i have seen is about £250.00. I do not have a problem affording that but there are modern options by Townshend that are worth exploring. Likewise I just find the thought of accessories costing as much as many a component a bit silly.
That said I would like to know what goes into their design
Townshend Seismic Isolation Pods cost $675 (I paid about the same for my AT-616).
The Seismic Pods come in individual weight capacities of as little as 1-2 pounds per Pod, to as much as 64-140 pounds per Pod.
The set of 4 x AT-616 support 10 to 60 kg (22 to 132 lbs.).
See what’s inside the AT-616 , i like this design very much.
I never seen the AT616 anywhere in Europe or USA for the price you’re referring to (the price you mentioned is for cheaper and smaller AT-626). If you can find AT-616 for 250 pounds buy it immediately! I would buy two sets myself for this price if it’s true. 250 GBP for the set of AT-616 is a joke, it's steal, almost like a free gift!
The AT-616 were about 400 euro even 7 years ago and now cost twice as much (or very near). I sold my spare set in 2019 and you can still read and check pictures if you you need more technical details here.
Anyway, the AT-616 is what i’m gonna use under my Victor TT-101 plinth @lohanimal