With the base’s side assemblies glued up, I turned my attention to the top and bottom stretchers. Using the material on hand, I took the following approach: First, I oriented the top stretchers so the side grain faced up. This made the top stretcher assembly more like an I-beam and adds tremendous rigidity. Second, I turned the bottom stretcher so the long grain faced up. This adds a slight amount of flex but it adds visual weight to the bottom, where it’s needed. I did this by gluing a few boards together. You can see in the images below that I was pushing the limits of the table saw to get the angled cuts. I cut the bottom first and then snuck up on the final length of the top pieces (hence, why they are clamped together).
At this point I had angled side assemblies, angled top stretchers, and angled bottom stretchers. I was suffering from angle madness to be sure. But during this stage of the project I was pretty familiar with the correct orientation of the domino relative to the orientation of the mortises. The bottom was pretty straightforward 30 mm plunges on the side assembly and 70 mm plunges into the stretcher.
One thing I found useful was to listen for the “click” of the stop pins. As you tilt the fence relative to the angle of your workpiece, the stop pins will make an audible click when fence and workpiece are perpendicular. This works when the angle is obtuse relative to the reference face of the work. When the angle is acute I was able to get away with plunging at 90°. Simply put, don’t over think it. Just make some test cuts and you’ll figure it out.
With all dominoes installed I did a test fit. It seemed pretty rock solid, but I’m a belt and suspenders guy. So I took some off cuts and made internal bracing for the top assembly. Then I busted out the glue and long, long clamps. I also used several angled scraps to keep clamp pressure in the right spot.
Finally, I pinned the joints with homemade dowels.
Visually, I’m quite pleased with the final result. Hopefully it’ll mate well with the top and stay rigid for years to come.