The frame assy is not mounted on the deck but is mounted on the rail. We have found that having the frame mounted on the deck makes it harder to board from the side. Also, due to the long boom on a 35.5 and the required height that was necessary to stand behind the wheel ours is shorter then most since it terminates at the end of the boom. It does extend behind the rear rail so it will provide sun protection on those hot sailing days. We do have an extended bridge that zips in to give the cockpit the cover when needed. The access zippers for the back stays zip to the sides of the bimini thus providing for a one piece zippers for both the back frame attachment and either the sun curtian or the rain canvas that extends from the rear of the bimini to and below the real rail.
Hope this hepls
Bob