I have a Seaward 17 with an oversized mast. My main has a bolt rope that likes to get stuck about 1/2 to 3/4 of the way up. It feeds find for the first 10 feet, then binds up. I've been able to raise it fully only a couple of times with humgous effort. I've cleaned the track, and tried several lubes with no success. Can the size of the halyard make a difference? I'm currently using 3/8 nylon and an appropriately sized top sheeve.