With all the notches finally completed, the next task was to dry-fit all the stringers into their final positions. After months of bending, adjusting and repeatedly testing the fit on the frames, I already suspected that the alignment of the frames was no longer perfect. The forces involved in bending the stringers are considerable, and over time they had inevitably pushed some parts of the structure out of position. Stringers finally in their final positions! I removed all the stringers and started the alignment process again from the beginning. It became a bit of a back-and-forth exercise: I would align the frames, install some stringers, observe how the bending forces affected the structure, then adjust and repeat. Eventually, I found a process that worked well for me. Aligning the frames (again) The first step was aligning each frame with the next one. For this, I used the laser level aligned with the centre markings I had previously made on the strongback beams. The strongback had...