I'm new to the world of DD turntables and I'm currently fitting a self-made aluminium armboard to my Mk2 techy and have had to take off the rubber base and the hard intermediate damping layer (IDL?) which I had to drill to make room for the armboard screws.
While the IDL was still on the deck I prodded it all over and was very surprised to find that it actually rattled in some spots against the aluminium top casting! The screws were all tight. It did not seem to be a very good application of "constrained layer damping" as I understand it. It also seems to be quite thin in many places-often just 3mm.
I've read on Audiogon that someone covered the aluminium top casting with plastic cling wrap and then applied a layer of liquid silicon on the IDL before screwing it back on. He stated that this seemed to bring about an improvement in sound.
Has anyone tried this? I would be intersted in a discussion about the Technics plinth and how effective it really is.
(yes I have seen Frogspits laminated DIY plinth and cannot wait to hear how it sounds.)