Why do you use the bottom sheave anyway? I prefer to pull the sail up standing by the mast, pulling the halyard from the cutout the sail feeds into. Same for taking the sail down again.
I did this since like maybe the first sail outing. It is much better and smoother.
Anyway as far as carbon mast goes, the cost skyrockets compared to the aluminum superwing. I have lots of room to improve the tiller handling to justify a carbon mast.
I mean the difference between aluminum and carbon is exponential and very unattractive. <img src="http://www.catsailor.com/forums/images/graemlins/shocked.gif" alt="" />
