The K.I.S.S. Principle
You may want to look into installing a Tides Marine "Strong Track" System. It is a continous length of UHMW(Hi density) plastic track that is machined to fit into your existing mast groove. It is very easy to install, and the cost is far lower than some of the other systems available. The system comes with the track, all necessary luff slides and batten fittings. The luff slides are all stainless steel. This sytem virtually eliminates any friction of the sail going up or down. The cost is $25. per foot of luff, so with a 40 foot luff, the system would cost $1000. A sailmaker would need to convert your luff to the tides hardware, but that should only run about $125-$200. Ask your local sailmaker about the system, he might even cut you a deal.Once installed, you don't have to do anything, except perhaps a fresh water hose down once and awhile. It truly is a simple no maintenance system.