Turntable Mats for Technics Grand Class, "G" Series

Too bad Technics lost their mojo on mats for high-end TTs! Currently I use Denon DP-80 mat (NOS) on my SL1200GAE.. second to it is SFTG172-01 / RGS0010, original Technics. 

I own or have owned a DP80 and Technics SP10 Mk2, 2a, and 3. What do you find to be so different among the rubber mats supplied with those TTs that would lead you to conclude that the Denon DP80 mat is superior to the Technics mats? I didn't hear much difference among them and replaced all of the OEM rubber mats, ultimately.  What the DP80 does have is that platter that is split so as to isolate bearing noise.  I do think the DP80 outperforms the SP10 Mk2 and 2a, but not the Mk3. A properly functioning DP80 is tremendous bang for buck even compared to any modern TT up to around $5K or maybe even more cost, IMO.

I would like to try the Luxman mat but it’s a lot of money if I do not like it. 

Why does the mat have to be glued to the platter? Seems to me you’re better off with nothing between mat and platter, for best energy transfer.

@lewm It depends on the platter pad to some extent. But the pad, if its doing its job properly, is damping the platter as well as the LP.

To do that it must be the same hardness (durometer) as the LP, and then have damping properties so all the energy coming from the LP as its being played is absorbed with none reflected back.

I don't disagree with anything you wrote about the desired function of a mat, but my question was why does the mat have to be glued to the platter?  The glue itself forms a boundary between the mat and the platter, which may or may not reflect energy back into the mat. Further, if as you suggest, the mat is damping the platter, that is all the more reason for not having any physical boundary, like glue, between the two. So I was just curious why you stipulate that the mat needs to be glued to the platter.