Continuing the door hinges. After positioning the cabin hinge halves in the pockets on the top of the cabin, the cabin top, inboard holes are match drilled. This allows the hinges to be pivoted to be square with the other hinge. A reference line is then drawn to help with keeping both hinges square. When aligned, the top outboard holes are drilled. I used a piece of scrap metal and two-sided tape to hold it to the hinge. This allowed me to clamp a ruler to both hinges to check alignment and freedom of the swing. The rest of the holes are then match drilled. Then was time to crawl inside the cabin and drill the door hinge halves from the inside - out. It was very gratifying to see the doors mounted and how smooth they open and close. I have elected to install the after market AirWard reinforcing plates. The installation of these plates also allows for much more easy removal of the doors if needed. That will be my next step.