I have a 2003 Litespeed road bike , titanium , want to install a quick release seat post clamp - I removed the bolt/screw that tightens the existing clamp and what remains looks like it's part of the seat tube , wasn't expecting this , thought it would be a removable piece - does anyone know if a braze-on clamp is common for a bike of this era , 17 years old doesn't seem like a long time ago - I guess the quick release clamp would just go above this clamp .