Yes, I know him. He had some help of another Dutch builder, Sander de Gier, and got to use his workshop and some tools for some of these basses. One of them actually IS a Sander de Gier Origin, covered in pieces of shattered mirror: http://www.bas-extravaganza.nl/?page=bassen&BassenID=23
Some of his creations are truly mad. He was just experimenting, really. Some of his creations turned out fun, some didn't. With some of his experiments, playability, tone and practicality didn't seem to matter at all. That two-string for example, it was built with bits of wood that remained after building the Les Claypool style 'Zebra'. But because of the narrow neck, there was no room for a trussrod. And by now, that neck is bowed like hell (I know its original owner, who actually gave it away. He also owns that Punkbass (which spends most of its time hanging on the wall) and used to own that crazy plywood bass with the Kubicki-like laminated neck (this one: http://www.bas-extravaganza.nl/?page=bassen&BassenID=25 ) that he had a luthier paint metallic purple.
