Years ago, I removed the rubber rings on the platter in favour of a sorbothane mat.
Now, I've replaced the sorbothane mat with this acrylic mat (like oracle):http://cgi.ebay.co.uk/XTM1-MATT-BLACK-A ... 19bf4f92bb
and a clearaudio twister clamp. I have some damping rings coming that go around the platter.
I've been told that it is best to actually glue the mat to the platter, I'm going to try vinyl double sided tape on the outer ring to hold down the mat. It will be cut to cover the entire outer platter.
But before doing that, I want to fill the empty rings.
Up for contenders is Duct seal -- a heavy pliable compound with a specific gravity of 21 vs DAP Butyl-flex -- a flexible adhesive caulk with a specific gravity of 1.4. FWIW, acrylic has a SG of 1.4 as well.
What do you folks think of these modifications? Sacrilege? Which filler, duct seal or butyl rubber caulking do you think would be better?