My "new" Mac 1994 swing keel boat came with the cover for the pop-top. It has a line around the base of it, not sure where or how it ties down and is mounted... I have been trying to install the cover, but I'm not finding a way to really seal it out. Are there printed instructions for this cover? AND, does the cover leak rain water, it seems like it might? Does it keep out mosquitoes? I'm in chilly Michigan so I've not been able to see its limitations. Sure would appreciate any help with this, and thanks. Bert