[fireman181]

Hi, I am a new owner of a 1983 25' Mk11, have been scraping the bottom and re painting. While the mast has been down, I noticed the bottom of the mast has 3 sheeves, while the mast head has only 2 sheeves??? What is the third at the mast base for??. Also, what is the best way to rig for a spinnaker, do I rig a double sheeve pulley at the mast head for a halyard and a topping lift, and how do I attach at the mast head..........any info greatly appreciated....Buck