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Bananabender said..I guess this would make life a lot easier for a solo sailer.Not too sure about
sail trim though.

At least it's not inside the mast.
Can't have horizontal battens so yes not good sail shape.
Lots of extra weight and windage aloft (which you cant get rid of in a storm) with it's attendant pendulum effect including the mast steps which are probably a necessity to service it.
As someone who is currently fixing their headsail furler it's a big NO thank you!