I notice that lots of boats have the bimini rigged with a rigid strut that keeps it up and out of the way (kind of like a roll bar) when it is closed, as opposed to having it on the rail. Some people have it rigged so that the bimini leans forward and some so that it leans back. Any opinions on which makes more sense? Let's assume that in both cases it can be rigged high enough to walk under with no problems.