l want to build a solid wood turntable

OK....I'll ignore all the shungite and etc., and approach this in a somewhat serious fashion....if $ is Not an object....

Waterjet a granite slab for the base.  I once approached the process with a 1" clear acrylic slab, but wasn't able to follow through with the project.

I was going to approach it with a direct-drive motor; in retrospect, a belt drive would allow for isolation, but an untoothed belt would allow for precision provided one could ensure near zero slip.

I'm a tangetal arm fan; 'nuff said.

Cart?  As said, $ no object.  Whatever one feels will make one happy...

As for support, pour a concrete column and place the above on it with sorbothane isolation pads under everything.

At the end of it all....if it doesn't make you happy....

Find another pursuit.

Sam here and i don't plan on buying a commercial cartridge that will ruin the sound.l have to build it thinking out side the box now that l have trained my brain to connect with my subconcious  i will let it do all the work because it has no restrictions + adding my vintage frequencies will put me over the top.

Oh, I forgot about the platter.....*tsk*

A machined lead alloy.  An alloy, to allow for strength but applying the mass of lead for stability....

All of this ought to be in a temp stabilized, dust free, near zero humidity cabinet that's allowed to come up to speed.

Remote cueing, of course.

An additional side cabinet to allow the lp to adjust to the 'play' space would be a +....but that goes without saying.....

Sam here and i'm not trying to be funny and i have no idea who kenjit is however did he use vintage frequencies to make digital audio sound like vintage analog vinyl like i did and proved it on this site with the people who really took that post serious and tested my discovery were blown away and i will reup for anyone who wants to run there own test.You can kill the messenger however the results remain the same.

If you look on Google you can find a Plinth, Platter and Tonearm produced from Manufactured Bamboo Board.

I have recently seen reports on a Type of Manufactured Bamboo Board where the early Materials Properties Measurements are showing it to have attractive properties like Panzerholz, but not a like for like match.
If I recall the term used as part of the Manufacture that refers to
Side Pressing relates to the product.

The Bamboo Board seems to be a much more widespread product and is more affordable than Panzerholz if bought from a retailer.

There is a Cartridge using a very hard part of a Madake Bamboo Plant for the Cantilever.
I do not know if it is solely Madake or a Composite with a Metal Connected at the Bobbin End.