Stage 1 Complete

Here is the end of the first stage, with the floor in place, and 3 A-frames in place. The whole thing is an exactly equilateral triangle, with all internal angles at 60 degrees.

There is an extra cross-piece at floor level on the end A-frames which is flush with the side pieces as well as the one screwed on from the back, as we will need this to fix the door latches onto.

There is also a cross-piece quite near the top on the (human) door end, as this part of the end wall will be fixed, but the rest will lift out.