VPI HW 19 - replacing springs with pucks or cones


I have a VPI HW 19 turntable and have read in several places about a modification whereby the suspension springs are removed and replaced with sorbothane pucks or cones. Does anyone have experience with this modification? Opinions as to benefits vs. detriments? Most importantly, what size/brand/type of puck or cone works best? Thanks.
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I used to own a VPI mk4 TT. D J Casser cut the bottom half (at the tip) off 4 BDR cones for me. I set these on top of the springs and placed the plinth on the flat side of the cones. It was a big improvement for me. The sound was less warm with a big increase in dynamics giving a more "live" sound to the music.
Thanks to all who have responded so far. Based on Mark's response, I contacted VPI's on line help. Apparently they stopped selling pucks. The answer I received was that customers have reported that cut-up portions of the styrofoam "Noodle" pool toy sound fantastic. [I then (jokingly) asked what color sounded best.] At $3 per "Noodle," BDR products seem ridiculous. I'll give it a try, or perhaps some wood pucks as Dgarretson suggested. Thanks also to Opus for the sandbox suggestion. I've been looking into the Bright Star Big Rock and may give one a try as well. (Apparently, the tweaking never ends.)
Mike at VPI told me the same thing about the "noodles" They are not styrofoam, but are of a cell type nature, I just don't know what the material is. You can buy Sorbothane, but at he thickness needed it gets pretty expensive. You will see why some of this Sorbothane tweek stuff is so expensive. You can buy bulk Sorbothane at McMasters Industrial supply. Other people have used brass cones, Herbies Tender feet.
Geez, Then it's evident, that VPI has chosen to get as far away from the HW-19 as possible. Darn shame, as if they chose, they could still be providing some of these parts, and upgrades paths for literal tens of thousands of these tables still in operation. I believe there would still be a market for these parts.

No dohbt whatever parts are left in stock, are leftovers from old production, and they are not buying anything to keep stock up.

Not dissing VPI, but fact is, they didn't sell any of those parts without making a marginal profit.

A shame as well, that no third party picked up the ball, with things like custom Plinths, ArmBoards, Footers, and other tweaks.

As for the Bright Star Big Rock, one could make a very good clone at a considerable savings. A smaller sheet of 3/4" MDF 2'x4' would be enough to make the Bottom, and the insert for top, in which Places Like Home Depot sell for about $8

4" wide Oak for the sides, some Sand, some glue, and clamps, and where the gaps are around the SandBase Plinth, use 1/2" foam weatherstrip to hide the Gap. Shouldn't cost much more than $35 tops, even with some Stain, and poly Varnish.

I think I have a link for this simple DIY Sand Base, and will try posting it. Mark