Hi Tony, welcome back
According to the cover he plays the Wersi Pegasus Wing V2, the Wersi Sonic (As yet unheard by anybody) and his custom Wersi Louvre called Volcano Magic.
The short promotion video shows him on the Louvre, you will probably have to wait until the Okey Festival to hear him on the rest. (Or buy the CD when it comes out)
If you compare Wersi instruments with all the other manufactures, you will find they are priced the same, so how you get the idea they are out of touch with the real world is totally baffling.
Perhaps this site will help
http://www.robertbartha.com/ if not, try viewing the site with your grandkids, as they will be able to explain it to you.
Hope this helps
Bill