Turntable Mats for Technics Grand Class, "G" Series

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.

I'm done taping and gluing down mats.  I did that with the Funk Firm product. Never again. 

“….Denon DP80 mat is superior to the Technics mats?"

technics mats have less contact area to the vinyl record surface comparing to dp80. also technics mat's pattern does not work well with additional weight.. also, rubber itself seems is a bit finer in dp80 mat.. 

I use the Funk Firm Achromat on my 1200G with great success. I haven't glued it.

For users of the Boston Audio/Sakura graphite mat: no concerns about/experience with the mat scratching your records?