Hello,
My knowledge of German language is not good enough to fully understand what is going on here. BUT i know some things are not going like they must be going.
Firstly Verdier in France should inform us where we can buy a Verdier when we are living in Germany.
Maybe there is something wrong between the German dealer and Verdier in France. THEN Verdier should tell the German people they can buy there turntable in any other country they like. If i would be a German wanting to buy one i would ask Verdier ( i do speak French) can i still buy a Verdier in Germany with good after sales.
Maybe Verdier does not like that there a companies or hobbyist selling Verdier with another basisplatte? If you can get the drawing of this board in dxf/pdf style and you can send that one to a machine company that would be ok. I think JC Verdier would like you to do the experiment and tell him the results. If the right company get the exact '' data '' needed to convert to a file needed to make '' drive '' a cnc machine it wont be that difficult . AND the 10 you will machine tomorrow will be identical to the 5 you will need to order in 2028.
You can ask them to make some cavities and depending on your budget and the construction of your house you can fill these cavities with dry sand, a kind of foam?, leadshot ( combined with oil like in the picture from Teres). Of course the board should come with instructions. If you have 60 mm diameter hole in a 60 mm high board you cannot make it 55 mm deep and fill it with leadshot because the 5 mm will bulge.
You just need to find a company close to your house where you can spend money on leadshot. I have done lots of experiments with lead ( so did JC Verdier) and spending 250 euro on bleishot will transform your turntable.
Greetings, eduard