Help! New TT skipping badly....


Recently bought a used VPI Scout with JMW arm  9 in.  Set up on shelf om my SolidSteel rack where I have always had a TT. Could barely breathe without arm skipping. If I walk anywhere near rack, skips. Floor is carpeted over hardwood, quite solid, never had issue with Clear Audio or Rega table. Took to Audio Connection and had completely gone over and adjusted. Better but still bad. Put cork /sorbathane blocks on shelf and put 3 inch solid maple slab on top of that. No change. removed top shelf and put the cork/ sorb. blocks directly on frame, then maple slab. still skips. everything is dead nuts level, and as stated, floor is firm. Went in basement and put a brace between floor joists, nada. Tomorrow I was thinking of taking rack down and removing spiked feet. Odds this helps? I know some will suggest wall mount, but I don't want to spend anymore money if I can avoid it.As I said, Ive had other TTs in exact spot and you could dance with never a problem. Any input would be greatly appreciated.As I said TT was recently gone over and is set up correctly. Thanks
winoguy17
@mijostyn : I still  have my Clearaudio Concept wood that I will probably be reverting to.

@earlyflynn  :  MC's Nobsound suggestion made the most improvement, but still not a complete cure.

@strigreen : someone else suggested this also, might give it a try today if time allows. I will surely report back if it works.
 As always, thanks everyone.
Make absolutely certain the cueing lever is fully clear of the arm tube, over the full range of the record surface. Always a good idea to double check this when you have issues with skips/tracking. 
amazon, prime, why not order 12 bargain 'solutions', try em, return em, .... 

surprise, my dinky iso-blocks worked, I expected to use them for something else.

a certain density, which we know not, should solve it 'enough' I hope.

I hope you get lucky
Hey @winoguy17 Mat from VPI here. If you haven't already, send over an email and some pictures of your setup, we can help diagnose and get you figured out. I will say our current feet/isolation is a major improvement over our older models. I always like to see pictures, especially when used, so I know what we are looking at. The Scout never really had an issue like that but if there are third party feet or something we are all missing who knows! Regardless, we are always here to try and help :)