I ended up using stock OEM footers and Greater Ranges Neuance platforms (no longer available) for my CD/TT decks.
The Neuance shelves are not unlike the construction of the Ikea Lack tables in that they are light and rigid with an internal foam-core and/or honeycomb like construction.
I've also experimented with the Lack tables as instructed by the designer of the Greater Ranges shelves with positive results.
Tried gobs of footers/shelves with good/bad/meh results, but eventually decided to work with the stock OEM footers as they were what the units were originally designed and voiced with (much easier path if the product is good to start with and you like the sound).
As mentioned use it for 2-3 months and pick out what you would like to alter sound wise and then start from there.
DeKay