In addition to the 2 I gave (which I have heard something about but will keep quiet at this point) you could ask him what he sees as a realistic timeline for a polymer modulator inside a transceiver making it to the marketplace, and what the most significant roadblocks might be for that as well as for mass production.
I wrote to him asking for a data sheet on the polymer product advertised on the splash page of the website: https://silorix.de/
He got back to me in under :30min. The photo of data sheet I snapped from the email turned out crappy on Stocktwits, but can’t figure out how to post a better one, here… But, if this isn’t LWLG material, what is it?