Isolation Feet for Garrard 301 wood plinth

Now that I have my table competed (almost) and table set up. I am looking for some suggestions as to what to put under the wood plinth, the plinth's main structure is bamboo ply, with Padauk wood feet 1.75" x 1.75" x 1" in height. the feet are machined square and true and look very nice with all the other contrasting woods. Bamboo, Padauk (feet and arm board), rose wood and maple inset. I have pictures in my profile. I have the table sitting on a 18"x24"x3 granite slab 165lbs that is sitting directly on the 3 posts of the top shelf of my Lovan Stand with each shelf sitting in pin points all the way to the floor and sitting on brass cups about 2" in diameter and 1/2 thick. I have fantastic stability and very little movement when walking around the room but I do get nose when taping the plinth and stand through the system ie cart etc. Its a dull thud but I think some sort of isolation may be in order between one of the layers most likely the plinth and granite. This set up worked very well for my previous set up the oracle Delphi. I would like to find something that is not going to take away from the visuals of what I think its a beautiful plinth but give me what I need to solve the issues. I also can not afford to replace my whole rack system at this time maybe in the future. budget up to lets say $1000. I will need 3 min but most likely 4 as the table is about 60lb total now. Have to say it sounds wonderful best move I made in audio in a long time picking up that Garrard 301 and building a table out of it. I will be adding some upgrades in the future like platters etc but for now i'm enjoying music again.

I added a Herbies audio record mat and looked at there feet they would work but to be honest not very attractive, I've seen some nice brass feet can not remember if they had any isolation.

Anyway to you my like minded hobby friends

I have Audio Technica AT616 under my 301 with pretty good success.  I've often thought about spring loading it the way my Dual 1229 is from the factory, or in a more extreme case the chasis of my EMT927.  Both of which seem to work exceptionally well.

i'm using some steel pin points i find they help focus everything better then the sorbothane I have also tried. seems everything I used that isolated softened the presentation the hard points tighten everything up and adds to the detail.  
Glen congrats on a really nice system. Love the plinth of your 401. I never got good results from granite in my system. There was a time I had my TT resting on a granite top. Had to abandon it . Too much ringing. Just something to ponder ...

I don't seem to get that effect but mind you my slab of granite is 165lb and sitting on a three legged stand with pin point isolation on every shelf. I also have the plinth on three pin points on top of the granite. That said I have my wood working guy boring another hole for a second arm and also making me a 4" think bamboo shelf i'm going to try under the table mostly for esthetics but may help in sound as well.
Yeah, a 3" slab of granite or bluestone ain’t going to ring. If any stone slab rings when you strike it with a hammer, don’t strike it when the music’s playing and you’ll be fine.