Thanks for the suggestion Doug. The problem we had on our boat was getting the traveller to travel out from the center, not centering it. A straight track and a tight mainsheet made it even harder.
I think you will be hard pressed in devising a bungee setup to help with this, Newtons laws beeing what they are <img src="http://www.catsailor.com/forums/images/graemlins/laugh.gif" alt="" />
My traveller car did not have proper bearings (neither ball or pin/needle bearings) in the rollers. I tought of trying to find some suitable bearings, but never did. Might have been a tough upgrade anyway.. Along those lines. A relative who is a mechanic by profession claimed that regular closed stainless steel bearings should be able to survive seawater. I disagreed, claiming that regular steel would corrode quickly. Opinions?