Goofy crap was intended for the ants, termites etc. comment. Believe me, I do not consider conservation goofy. But, there is a substantial amount of wood out there already. The Cocobolo I am using is an "estate piece" that was harvested in the 1920's. The rest of the wood is old as well. I'm funny about that kind of stuff. My shop is set up for production work and I mostly use engineered wood products. Paul's shop, Period Furniture Restoration, where I'm building the TT, is a craftsmans shop of the highest order. We do not misuse/abuse the medium in which we work!!
I don't think in the Teres plinth (or any other) there is anything remotely resembling tolerences. Now, before I catch hell for this, listen. As long as the top and bottom surfaces are parallel to each other, nothing else matters!! Otherwise you could not level it. Think about it. For that matter, the top does not even have to be flat, as long as the bearing is exactly 90 degrees from horizontal. I've been experimenting with designs, and this is the ONLY requirement that is set in stone.
Basically, the same goes for the armboard. Level, and the right height. It really does not even have to be part of the plinth. As long as it is stable, solid, and non-resonant, you're ok.
Obviously, resonance is a major issue with all of the pieces, but lets leave that issue for another day.
Platters are a different story. The major requirement there is balance. If the weight is not balanced, it will not run true, and will not be able to keep a constant speed. Of course, this requires balance in all axises (axii?) also.
Now, I want to make one thing clear about my comments. I AM IN NO WAY A TURNTABLE EXPERT!! YET. I have done sh**loads of reserch on this subject. I intend to build custom tables for sale. I have a couple of design ideas that I think are really cool, and I also think I can compete with anything out there. My brother-in-law has doctorates in electrical engineering and physics, and as far as the electronics are concerned, he and both I think the Teres motor/controller are the cat's ass! He's also a lawyer, but I don't hold that against him since intelletual property law is his specialty!
I don't think in the Teres plinth (or any other) there is anything remotely resembling tolerences. Now, before I catch hell for this, listen. As long as the top and bottom surfaces are parallel to each other, nothing else matters!! Otherwise you could not level it. Think about it. For that matter, the top does not even have to be flat, as long as the bearing is exactly 90 degrees from horizontal. I've been experimenting with designs, and this is the ONLY requirement that is set in stone.
Basically, the same goes for the armboard. Level, and the right height. It really does not even have to be part of the plinth. As long as it is stable, solid, and non-resonant, you're ok.
Obviously, resonance is a major issue with all of the pieces, but lets leave that issue for another day.
Platters are a different story. The major requirement there is balance. If the weight is not balanced, it will not run true, and will not be able to keep a constant speed. Of course, this requires balance in all axises (axii?) also.
Now, I want to make one thing clear about my comments. I AM IN NO WAY A TURNTABLE EXPERT!! YET. I have done sh**loads of reserch on this subject. I intend to build custom tables for sale. I have a couple of design ideas that I think are really cool, and I also think I can compete with anything out there. My brother-in-law has doctorates in electrical engineering and physics, and as far as the electronics are concerned, he and both I think the Teres motor/controller are the cat's ass! He's also a lawyer, but I don't hold that against him since intelletual property law is his specialty!