Rex,
There are several things you can do to improve how the sheets go back and  
forth. The obvious is to put shroud protectors on the two forward and two  outer 
shrouds. There are several variations that involve the use of PVC pipe and  
are quite cheap. For racing, Ed uses a method that I would prefer because it  
rolls. He has an inner and an outer piece of PVC. They roll quite easily.
The knot where the sheets attach to the sail is another item that can  
modified with many different materials to slide easily. I've never done it  myself 
because I'm not a racer, but several ideas come to mind.
 
Rummy