My '74 PX10LE is one of the models with the steep head tubes. It is very twitchy, and I made it worse when I switched to a stem with less extension for a better fit. A more aggressive rider or a racer might describe it as responsive, but I ride to relax and unwind and it's not conducive to that. The Gitane felt just right to me from day one and it's my favorite ride. I don't ride the PX10 at all anymore. I hang on to it just because it's hard to let go after 39 years.