There are so many variables in those joints
. Like Nick my mind is blown.







The thin ribs are glued to the platen so they don't fall over. The ribs are scrap 1/2" x 2" particle/chip board and the platen in 3/4" MDF.Looks like your cauls are around 1/2” thick, at first I looked at them and thought that’s a good idea as they will be easier to make than my much thicker ones, then I imagined them falling over at glue up time. Difficult to see on the pic have you fastened them to a bit of ply?
It’s a useful way of making a large platten.




Not easy fitting those by the look of it, never tried and not sure I want to lol.Assembly day has extended to a week+. I decided to fix some niggling details and also got derailed by other projects around the house.
One detail was that I decided to correct was the panel that makes up the shelf at the top of the drawer section. This is what I had:
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Which I chose because it was a single wide board. But it had a lot of tear out and deep checks that I couldn't fix without making the panel too thin and the figure, although nice enough, would never been seen since it would be a shelf covered with stuff. So I glued up a new panel from some clear, rift sawn stock. Which took some time to make and now is awaiting two more coats of oil finish.
Much more in keeping with the aesthetic of the rest of the cabinet.
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Then I tackled installing the hinges. I had the geometry worked out in Sketchup and I was 96% certain they would swing properly if I got the layout correct, but I was less certain about the clearances I needed to install them. My fear was that, since they are partially covered by the posts, I would not be able to install them or remove them once the posts were fixed in position. But now that I have carved out the relief cuts I see that there is just enough clearance for both tasks.
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While I wait for the oiled shelf to dry/cure I've moved on to milling parts for the doors.