Vintage DD turntables. Are we living dangerously?

I would recommend the Goldmund or the Boston MAT 2
If you have access try the Lexan for spaciousness or Metacrylate.
Delrin is not bad also if is in between cork (lower level)& copper (upper level). The sound of Delrin is dull/cloudy 'cause of it's damping ability.

I must admit that Copper mat is not my fav, as I've found it somewhat coarse with a rough and overwhelming projection but also overall thin body of sound. Maybe this reflects the system matching & fine tuning in my set-up? I don't know but I would love if it could manage to sounds like it looks. Not Delrin, neither Copper but also never anything soft with even the slightest elasticity no matter if it is cork or leather or felt or especially rubber.

Dear Thuchan, yes you have right and I absolutely agree but ... the point of my reluctance about using anything soft, realised by my worries of a possible removal of the LP by elasticity when the stylus drag makes it's demands, but also because the very thin felt mat needs to glued upon the copper in order to stick there and not on the LP's downside everytime that we have to change the record. Another thought would be that by using a soft surface in contact between LP and platter, we break the continuity of flow for the resonanses which created by the needle upon the LP and we just damp instead of drain them. This method poses the danger of returning the resonances to the needle but as vibrations this time. Any way I've tried your suggestion and I like the sound. It is only that (like the isolated armboard) it does not conform with my general outlook regarding the resonance treatment. I still have some reservations about the possibility of making a second wrong decision in order to fix a problem that arise by a first wrong decision ie: to balance a mistake that we can't comprehend all of it's parameters, by throwing to the game a second mistake.

Dear Halcro, are you imply that your system set-up is neutral to the bone? and therefore it is impossible to hide inaccuracies which can drives you to mask because you can not understand their origin?
ie : arm wiring, IC, speaker and power cables and even their connectors, rack, shelfs and even the surface of contact that reacting as an interface with your items and lets not forget the selection of components inside your items and how they interact as a company and of course the cartridge/arm & phono stage interface.
It is funny how easy we can perceive a cure only with the hope that it can manage to hide the problem. I know people with 104db horns who are in search for the most slow & fat sounding capacitors (among others) in order to escape from reality.

Dear Halcro, I really appreciate your exploring mood and I admire your efforts but sometimes we must keep a second thought for what we've done even if the resulting effect is to our liking, we have to put in doubt those cheaters that may cover up the real problem. Imagine someone who has an agressive HF and covers the tweeter with a blanket instead of looking at the source of this anomaly. In every idea that I spread, my motivation is to give you some reluctancy in order to secure the right path in your experimental nature. Please do not accept my reservations as disrespect for your adventures. The lack of confidence is a must when the knowlege is restricted. Our ears can only acknowledge the problem and suggest the perceived outcome but the solution is detected by our relentless search while we maintain discipline over restricted regulations. ie : if my armboard is ringing, I have to choose another material and stop trying to damp it by wraping the hell out of it. There are rules for us to follow if we want to progress with integrity.

Dear Halcro, whether Thuchan is correct it is debetable as I've gave you my reservations in my previous post and your idea for a nice heavy record clamp can trigger more than just a field for a second and even more heavy objection. It is one thing to just filling your needs and a completely different one if you decide to do it with the right way.
"Of course it sounds great, the best we've heard till now, e.t.c. But still, it is just a way of giving a fight with what we have, and the results are quick and the success is great... And we are in danger to follow the wrong direction because of this."
and :
"...due to our limited knowlege about interactive materials & mechanics & thats the reason we accept the isolation as the only way (but is not the right one)".

An excerpt of my reply in your thread about the Copernican view on TT and I repeat now. This is my own personal assessment to these matters when one is point the isolation as a weapon.