Re: Consider Birdsmouth
William R. Duffield on the Cohansey
>I agree. I've also built adjustable shelves, and find them to be very useful over the lifetime of the case. I've made them with the little metal pins, punching rows of holes with a router and jig, and also with the birdsmouths. The pins are a whole lot easier and more flexible, but my preference would be to only use them when hidden behind doors and faceframes, or at least when mostly hidden behind books. The completely wooden adjustment mechanism, while providing somewhat less flexibility, probably gives enough for all but the most utilitarian cases.
I'm not familiar with the aesthetics of the Kentucky style. If Mr. May and others who defined the stile used them, then go ahead and do so without guilt. Otherwise, use the more traditional method.
Something else to consider: What are you putting in the case, how much weight must it support? Many cases, especially those that are somewhat taller than yours, benefit structurally from a fixed center shelf, to tie the case together in the middle {like a belt}, with additional adjustable shelves above and below it.