TT mats

bondmanp, Thanks for that info.  I will look into that mat for use on the TT101, which also has a coreless motor.  Both the TT101 and the L07D motors are derived from the original Dual cordless motor (as is that of the newer Bergmann DD turntable).  In these motors, the stators and rotors are oriented 90 degrees differently from those in typical iron core DD motors, such that I think there would be a field directed upward toward the LP.  In any case, the L07D behaves as if there is.  I've often thought of buying a meter to measure the field strength, but so far thought has not turned into action.

"coreless", not "cordless"

Try a Moo Mat.  Naturally low on static electricity and looks cool.  Each one is unique, just like the cows they come from.  The famous folks at Decibel Audio recommend them. Good enough for me. 

handyman,

I too, have an older VPI TT with a heavy metal platter.  I am using the GEM Dandy R.C.C. (Rubber Cork Compound) Turntable Mat.  Designed and sold by George Merrill.  BTW "GEM" are Mr. Merrill's initials.  He sells many well designed analog products and of course his own TT's.
Link to the RCC:  http://hifigem.com/rcc-record-mat.html  This mat is constructed of 2 different types of rubber with differing energy absorption characteristics and cork to aid in the transmission of energy into the mat.
A brief review link: https://www.dagogo.com/practically-priced-tools-for-the-lp-lover/2/
In addition, no discussion of energy absorption/control would be complete without addressing the myriad methods of record clamping.  I again will offer the following link that Mr. Merrill addresses: http://hifigem.com/record-weights-and-clamps.html
I am not familiar with the previously referenced Isodamp SD125 mat.
My RCC mat performs with aplomb at $60.  Spend your additional funds on proper record weights/clamps!
Good Luck

I use a custom made (as in I asked the guy to reduce the diameter) acrylic mat topped by a  Teac Washi  https://www.musicdirect.com/accessories/TEAC-Washi-Turntable-Mat
on my Oracle Alex III with an aluminum alloy platter.
I tried the Acrylic because that's what Oracle has switched to. It proved to sound somewhat cleaner than the Groove Isolator that I was using. Still, I didn't have the nerve to clamp mt vinyl down on such an unforgiving surface. Hence the Washi. 
These days I remove the Washi when playing 180 g LPs and clamp ever so lightly. This compensates for VTA (I tell myself ;^).

Anyway, it sounds very realistic and 'present' to me.