flattening

I was thinking of adding a flattening reef to the main on my E28 in order to gain more flattening than the outhaul will provide. I have a lose footed main that is fairly new. I have always thought of the flattening reef as an outdated device for older sails that were shelf footed. Now I'm...

Hi; i recently bot a (used) main with 2 rings I'm not familiar with; maybe the forward is a cunningham; the aft one is a mystery to me. How do these work? and when? It seems to me that all they would do is reduce sail area. the sail is shelf footed; I don't know if that has anything to do...

Hi all, I'm a bit perplexed with a zipper that extends the length of the foot of my main sail on my E-29. When unzipped, it allows the main to be "fuller" much like a loose fitted sail would be--but only by a few inches. My question is why it is there, as many sailors more seasoned than me...