Have Auditorium mat in place now, managed to get one locally.
A major improvement in the static department.
The A23 sounds to be better than the stock mat but I have not really compared them directly yet since the A23 is currently doing battle with some packing material I found at work and converted into a mat. They are the same thickness so I can leave the arm at the same height to test.
The A23 and the packing material are both very good, but different. The packing material mat seems to be better in the midrange (more articulate and fluid) but a bit splashy in the treble. On the other hand the A23 is more controlled in the treble and maybe with more detailed bass. Also, the packing material mat is not immune to static cling.
While waiting for the A23 to arrive I also tried out some drawer liner and that excelled with extremely well articulated bass (better than any of the others) but also killed off the treble somewhat.
Never really played with TT mats before and am finding it quite a surprise just how much difference materials, even which way up they are, make. So far I prefer to use the A23 with the cross hatched side down as this seems to get it closer to the midrange performance of the packing material mat.
This could take a couple of weeks.
Steve