Prior to setting out on further adventures with the table saw, I decided it would be useful to put something together that would allow be to assemble parts at 90° to each other. I started by gluing together some offcuts of 18mm ply to make small pieces 36mm thick and then cut them into squares using the chopsaw, after which I cut the squares across the diagonal into 90-45-45 triangles. A little work with the bandsaw to cut out some much smaller triangles from the “diagonal side” left me with these.
Right-angle jigs which can be clamped into corners of pieces that need to be joined at 90° whilst screws are put in or glue is allowed to dry. I’ve nibbled off the right angled corner so the jig itself doesn’t get glued into the joint if (or more likely, when) glue squeezes out of the joint.