Hello Peter,
Great system you have there. I just read a post of yours on a thread about VPI arms/tables. I see you speak from experience. I can't tell from the pics, is your arm the JMW Signature, or the standard? I upgraded to the Signature, and found it to not be a subtle change. Something that may sound questionable, but has turned out to be amazingly effective, (and cheap), is Mapleshade's NanoMount system. Drains unwanted vibrations from cartridge body through headshell, tonearm, and into the plinth. Really cleans things up. Isolation has helped a great deal as well, using a Brightstar Audio BigRock with coiled springs below, ala Dave G. It all helps. Even a Scout can sound great with a few tweaks.
Enjoy that great system!
Dan