I just got this boat - a Catalina 310. I've been sailing an older, simpler model for a while. Anyway, I finally got the boat to my lake, and was going on my inaugural sail yesterday, and the mainsail stopped short of being all the way deployed. I'm sure it's an adjustment, I just can't figure out where. It goes up about 80% of the way; at that point, the line that runs through the second grommet on the leech, back to the boom is tight, and won't allow the sail to be raised any further. I loosened the boom lift, and it was no help. Can some of you more experienced sailors tell me the right adjustment?