Fully Battened Mains and mast tracks.

On my previous boat I had a FB main with cars that ran in the tracks with intermediate slugs, and a stack pack main. Superb system, the main and hardware was by Parker and Kay. I believe most of the major suppliers.. Fredericksen etc supply the cars. It saves weight to have them in the luff groove rather than having a new track fitted. Mind you there are some who think it isn't seaworthy as one can only hoist and lower the main head to wind.
 
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