I'm looking for a main/trysail, and have slugs with metal clips holding luff on, plus boltrope ? on foot. Can I use what they call 'slugs with boltrope' at www.thesailwharehouse.com ? I'm looking for a trysail, maybe 20x9/8/7 with a reef or two. This will be about equal to a main with 3-4 reef pts...