Very cool. Thanks for sharing.

This would have been a fun joint to try to make when I was making flag cases.

 

Would that be feasible with a handheld router and some sort of template or jig? Or would one have to resort to hand-cut dovetails?

 

As I remember, one side of the slots have to taper in so that the opposite side when sliding together ramps from the wide top to the narrow waist. I suspect it could be done with some careful setup using a sloped fixture and offsets for each slot. Then another setup for the mating side. I used my CNC with an adjustable angle clamping jig to hold the parts, and some tedious vector layout for the dovetail bit to follow. It took me a couple of tries to realize how to get a good fit between the sides.
4D

 

Cool

 

I'm a spline junkie. This would be a cinch, easy peasy on a table saw. Slice the end of each piece at half the angle of the V shape, glue and clamp using the cutoffs during clamping, then cut slots for splines on each end, insert and glue the splines. Or cut a long, stopped slot across the angled cut, glue in the spline, and clamp.

For something like a flag case, I'd use the same approach, but make spline cuts on the router table, then use splines shaped to match the size of the dovetail bit. This will look a bit like a faux dovetail.

 

For the simple connection a single dowel (or maybe two) in the center between both side would keep them aligned while clamps held it together until the glue dried. It is mostly face grain to face grain. Once I had a CNC and a way to clamp parts at an angle my mind drifted from simple to more complex solutions mainly to keep myself challenged. That helped me prepare for student designs that were close to impossible to make or join together the parts of.
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