thanks for that info. I actually made 2 leather mats today. A thin and thicker leather. The thin really brings out detail, but find I loose a bit of the "Garrard" sound. The thicker seems to give good detail and keep the signature sound. So far the best mat I've tried on any of my tables. I think I still want to try the copper mat though. I suppose a call to TTW is in order.
I had a look at your system Dan. Very impressive indeed.