Elder son called yesterday and posed a ?? -- I have a couple of ideas but they're I think excessively complicated so throw this out for Karl, whoever...
Upper kitchen cabinets in his house were built in place w/ one wall a set of straight-line cabinets and the 90-degree wall then butted against the face of these. The first cabinet is then open to the end wall while the second is closed at the face of the first. This, of course, creates a sizable area in the corner that is very difficult to use.
Son's idea/request was for a mechanism that if cut out the bottom of the hidden area could drop a set of shelves down for access then lift it back up -- his request was for suitable hardware design to latch and more importantly, allow the movement w/ support so would be more-or-less balanced w/ varying weight.
Swingman/nailshooter; you'se guys ever seen anything for same? I've not been in the kitchen recently enough that have paid sufficient attention to the details to know for certain about construction but my initial thought was to simply open up the end panel of the other cabinet--at least gives access from both directions that way...
Anyway, the deep square corner is routine issue; any other newer/novel solutions to help anybody has? (In my day I used to put in a 45 short section between and cut off the backs w/ false back so while lost some absolute footage in general it wasn't useful anyway but could reach the are that did...)