Ghdrpentice, good luck getting to that last upgrade, certainly a worthy goal. VPI has some of that upgrade capability too as you know. Sounds like you put a lot of thought into your turntable choice and it’s paid off for you right down to having some "looks" to it.
Having a friend who’s a Linn Master Technician is fortuitous too. I mostly have friends who’ve never heard of high end stereo equipment. The only acquaintance who has is a neighbor, who I gave all my old Phase Linear equipment and Dahlquist DQ 10’s to. I didn’t know another soul out here in the country who would have even known, much less appreciated, what that vintage equipment was.
Pindac, like you say it is important to have an effective system of vibration isolation.. I used some of techniques you mentioned in building the shelving housing my components,
The turntable itself was retrofitted with Isoacoustic feet which sit on a marble slab, floating on a layer of meshed foamlike material, sitting on a floating shelf of 3/4" cross ply Baltic birch, floating on another layer of soft mesh in turn resting on a regular 3/4" plywood connected to the side walls. I don’t know if this makes the sytem any quieter as I’ve never had the equipment situated elsewhere, but I sure hope so for the effort put into it. All the components now have the Isoacoustic brand feet for the same purpose as isolating the turntable, since that seemed to work so well in that application.
Mike