Your posts have exposed that a larger variety of people in the US used Eisentraut type of fixtures than i realized before. Of course after the bike boom (starting in 1971) there was no available fixtures to be bought in the US (that I know of). Like I mentioned over on CR, I had a set of them similar (or maybe exactly the same) that I bought with many other things when Melton went bankrupt in Delaware Ohio in the early 80's. He also had a wide variety of other kinds of homemade type of fixtures. It seems possible that Eisentraut saw a market and had some made. Or maybe he provided (or sold) plans for his fixtures. I'm curious how well they might work. I have always been suspicious if everything might end up correctly but I have no personal knowledge to judge them.