No, Ted, I am sorry if I came across as disagreeing with you. My view is that the doublets (sheriffmuir, montrose, kenmore whatever) all derived from what was everyday dress in former times and I see nothing wrong in wearing them in different ways, depending on how they work. The montrose doesn't really work unbuttoned without a jabot whereas the kenmore works with either a jabot or a bow tie and would probably be OK without either. The sheriffmuir I think looks fine with an open neck shirt or ultra formal with a jabot and tartan waistcoat. It also copes well with an expanding waistline which is another plus factor for choosing it as a versatile jacket.