slugs catching upon raising main
I had a bunch of problems on my boat (a J40) with the slugs binding, also especially while dousing the main. I finally decided to lick this problem for sure and bought/installed the ''strong track'' system from Tides Marine. It''s basically a ''plastic'' track that slides into the existing mast-track. This track then accepts nice stainless steel slides that won''t bind. It works nicely, and allows me to get the main down single/double handed. It''s not as good as the Harken stuff, but then again it also costs a fraction. May be overkill for your boat?