I am requesting help regarding the hand cut, half blind mitered dovetail (HBMD) featured in Chris Gochnour’s contemporary sideboard (FWW#277).  I’ve admired this piece since I first saw it in 2019 and am now trying to build it.  This is my first foray into mitered casework and certainly my first into HBMD.
In following his method outlined in the article, when you leave that 1/32″ flat at the ends of the mitered tail and pin boards, you now have (in cross section) a step to get rid of.  If you want the case’s outside corner to be 90 degrees, it seems like you’ll need to plane down the entire outside surface of all four case sides to remove the step.  This doesn’t seem right, so I must be missing something here.
I wish there were detailed, step by step, instructions for this magnificent piece.  It must be hugely popular as it always takes front and center in the Project Plans page, even though there aren’t true “plans” to be had for this, just the article, which doesn’t address many of the details, tricks, and trouble shooting that would be helpful when tackling this project.
Additionally, I am unsure about the seating of these dovetails on the 45 degree miter, as the slope is a bit slippery when knocking these to place.  (I’m not having any problem creating exact 45 degree slopes.). I can’t find anything on the internet that talks about these joints in any detail.  Help!