As a matter of fact, I still have the two sets he originally sent me. We had a brouhaha with the German post office when I tried to send them back (I made the mistake of insuring them for the value of their replacement cost, and he was going to have to pay hundreds of dollars in taxes to accept the package or something) and the strings were returned to me. So Gerold cut me a very generous price on the strings and I'm keeping them.
The TWINE set I will keep aside for now and use them on my old English bass which is being repaired. The CORAX set I've parted out, and the E and A seem to make a perfect match for plain gut on the D and G on this old Kay I've been thumping around on. Herr Genssler also told me about a new product he's offering which may interest some people:
"To inform you about my last invention: the ORIGINAL set consist of E and A string with gut inside and metal wound (clear sound and extrem long sustain) which can be combined with a plurality of different D/G strings as there are: plain gut, wrapped GD with plasics material, G plain-D roundwound, DG CORAX...So one can have the E and A to provide a basis for combining them with different GD depending on what stile there is to play. I think that is the most flexible solution I can offer. ORIGINAL is cheaper as CORAX, HELIX, TWINE but I don't give 2 years of guarantee for that."
I honestly don't know how the 2-year guarantee can work for him. The A of the CORAX set has already started unwinding and buzzing, and that's the kind of thing I would send a string back for. Sometimes I wonder if the difference in climate is not considered by our Continental friends; I traded a Eudoxa E and A to one of our TB members who lives in Switzerland (and works for Velvet Strings), and I told him beforehand that there was some typical unwinding on the A string. When he got the string, he was fairly shocked and said he'd never seen such a thing in all his years of playing every gut string imaginable, and that now he knew what people were talking about when they spoke of gut strings coming unwound and falling apart. The Midwest'll do that to some gut strings...
But I do wish Gerold the best in his enterprise, because he is making strings of a remarkably high quality. I'll continue to support him as much as I can.