Established size and shape of gear door based on position of ribs, gear, and skin. Lots of thinking, a bit of taping, some measuring, some marking, and finally, some cutting. Of course, I cut the door based on the wrong marks. Measure twice, cut once right? It doesn't help if you cut to the wrong marks. So, I got an extra, albeit smaller door if I ever want to build a 90% scale version of the Dalotel. Cut out a second door to fit properly.