I am surprised to see that the H28.5 was made in 1984. I assumed the run began in 1985 and ended in 1989. As to the bimini, mine runs the width of the cockpit and from the stern pushpit to just short of the mainsheet bridle. I have athwartship zippers to accommodate the backstays, and zippered pockets for the fore and aft bows. The central bow is supported by straps from the aft bow. It would be hard for me to imagine a slit to allow the movement of the traveler. I personally think that stainless frames are well worth the additional cost (as is Sunbrella fabric). My bimini is secured/bolted to the deck just inside the toe rail. I don't have a clear plastic window above the helm, but may add one some time in the future. I find that I'm able to see both sail shape and the masthead Windex by looking through either of the holes for the backstays. Not perfect, but it works. I had the leech of my main shortened which creates a slight upward angle of the foot. The bimini is a life saver and you are going to love it.