Originally Posted by Seacurves
Very helpful Paulo! One additional question, where does one learn about "a modern rail with modern sliders"?
There are many. Here is the one from Harken. It is not cheap but it is among the best (download the PDF - Battcar product brochure).
Harken: Battcar Systems Q & A
While you don't have a new mast track use this on your sliders:
SailKote Marine Dry Lubricant & Coating for Sails, Rigging, Deck Hardware and more. - McLube
You are not going to believe in the difference.