Nice work!

Seeing Domino's in use really is the ultimate tool porn I reckon!

CRG,

The square fixture is a clever idea.

Here, this woodworker shows his way of using the baseplate to register against the work. In my view, his method is superior to using a third party product such as the Dominoplate because it costs nothing (you just need a scrap) and most importantly, it can do mid-panel mortises without having to remove any accessory.

https://m.facebook.com/LeeValleyTools/videos/how-to-create-three-different-domino-set-ups-using-the-domino-500david-uses-the-/746598143392149/

For the record, I always use the fence for registration except when doing mid-panel type of operation, or using the Veritas Domino Joinery Table.

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After all of this work, I had to remake both of them. (There was another that went to the same job, that was only the normal1 1/2" thick)
It turns out that there were 2 different mistakes made, one by our draftsman, the other by the contractor.
The thinner one was too short for the opening because two different people "compensated" for the length, so it would fit in the opening without needing notched.
The thicker one, with the premade corners, was the contractor's fault. They lowered the studs in the section of wall where it was supposed to fit, to compensate for the thicker top. After the opening was measured by our guy, the contractor added another stud on each side of the opening, making it 3" narrower.
Trying to cut the original apart was not going to happen, so I remade the whole thing. This time though, I got to test my theory that it would be faster/easier to kerf-bend the apron. It definitely was.
That funny bump around the 7 o'clock point is the smaller one sitting on top, hanging over.