Have a full battened main and doyle stack pack with lazy jacks. When lowering the main it does not fall flat as the sail slides seem to stick. I have to go up and pull the sail down at the mast. I have tried several lubricates including the dry ones you spray on but nothing seems to work very well. I saw an ad for a sail slide track that is raised up the mast that takes the place of the groove/ track that is in the mast itself. It has ball bearings i think in the slides so it should let the sail fall effortlessly. Anyone using this? Other suggestions appreciated.