My sail is a 1970's Ratsey & Lapthorn model that is still in decent shape. However, it doesn't have a window, so am considering getting a new sail that has a window. One dacron sail that I'm looking at is very stiff and "Crackly" sounding. In contrast, my (nylon?) Ratsey is soft and quiet. I can furl it up nicely when done. But I can't imaging being able to easily roll up this dacron sail that I'm looking at. Is this normal or am I looking at a junky sail?