I re-read my post afterwards and it is confusing. I am thinking of building a CLD "donut-plinth" and then seating that "donut-plinth" within a larger plinth which would have the tonearms. The other way to look at this would be to think about it as a "table-board" the same way one has "arm-boards" for that kind of plinth.
I hadn't really thought about how much different a plinth would have to be between a couple of different TTs. It is not surprising, however, that they might have to be different to be perfectly matched to the table and top plate. I would almost expect that using a different kind of "table-board" inside a large/heavy plinth frame would actually go a fair ways to accomplishing that, but the answers so far point away from this.
Mosin, assuming different mechanisms require different sorts of tuning, how does one acquire the knowledge to know without a huge amount of experimentation what the best starting point is for a particular mechanism?
I hadn't really thought about how much different a plinth would have to be between a couple of different TTs. It is not surprising, however, that they might have to be different to be perfectly matched to the table and top plate. I would almost expect that using a different kind of "table-board" inside a large/heavy plinth frame would actually go a fair ways to accomplishing that, but the answers so far point away from this.
Mosin, assuming different mechanisms require different sorts of tuning, how does one acquire the knowledge to know without a huge amount of experimentation what the best starting point is for a particular mechanism?