In 2001, I met a titanium builder who weld my that bike. A lot of exchange with us and when I received the first drawing, it was "USV" in Russia, near Nizhny Novgorod. They built for several european brand as DNA Cycle, Van Tuyl, Grey Bicycle… and lot of other. I was interested by their work and I saw on the DNA Cycles web site (around 1999-2000 year) an hardcore model which could use either 24 or 26".
Welds were nice and the price… very interesting (400 euros at that time for a full ti custom frame !)