I have a 1997 Murry and would like to have at least 100mm of traval up frount. I think the Canondale Lefties are the way to go. I'm pretty good at welding so putting on a new headtube should be no problem for me. But I don't know where to get a new headtube. Dose Cannondale sell headtubes for Lefties? Is this going to mess with my geometry. Will I HAVE to use disk brakes (I don't trust them)?