My Oday 25 1975 has the original mainsheet traveling bar, car and push pins. I would like to know if it is possible to keep the original bar and use a new car and ends that would make using the traveler under tension possible. I realize that there are kits available to do the entire process but if I could do a refit it might be cheaper. I like the set up of the Lewmar size 1 better than the 0 which they recommend. Any suggestions would be greatly appreciated. Any idea on what kind and size the original track is?