Alan Has A Good Point...
...re: friction. FWIW, I just changed my main halyard from 1/2 Sta-Sat X to 3/8 Spectra. It is spectra core double-braid and I did my own splice. For me, the key was to get rid of the friction w/o adding stretch. Jib halyard is next. I had a Vision 32 and know that you do get lots of halyard friction.It was kinda funny with the eye-splice. I downloaded splicing directions for core-dependent line. It is a little different. I had it all done according to the directions before milking the cover back, and for the life of me, I just could not see the geometry. But, it came out fine. Anyone care to take a ride to the top? Rick D.