Frame #2 has been shaped and glued together. It is now clamped down on the workbench, while the epoxy is curing. I also made a plywood pattern for the gussets on frame #3. The gussets will be oversized by 5 – 6 mm (~1/4″). When the gussets get glued to the frame, I will be able to line up the inward edges (the ones with the radius) with the inside edge of the frame. The excess material can be removed later by running a flush-trim bit along the outside edge of the frame.