From HW at VPI...his response to questions on what mat to use:
I use three pieces of 1" wide black electrical tape on my platter now. Set at 120 degree spacing in the center of the groove area one piece is 1"X 1", and two are 1" X 2" with one of the rectangular ones 90 degrees to the other. Sounds crazy but Gary Koh from Genesis Speakers came up with this while using his direct drive VPI Vanquish. It works on all the bare platters very well.
He also uses three 1/16" balls glued to the bottom of his center weight at different distances from the center and using three different ball materials. I know, sounds crazy, it works beautifully.
I tried the tape last night...it works.
I use three pieces of 1" wide black electrical tape on my platter now. Set at 120 degree spacing in the center of the groove area one piece is 1"X 1", and two are 1" X 2" with one of the rectangular ones 90 degrees to the other. Sounds crazy but Gary Koh from Genesis Speakers came up with this while using his direct drive VPI Vanquish. It works on all the bare platters very well.
He also uses three 1/16" balls glued to the bottom of his center weight at different distances from the center and using three different ball materials. I know, sounds crazy, it works beautifully.
I tried the tape last night...it works.