Positionned, drilled and clecoed the left skin. Positionned the external cargo door frame inside then mark the position on the skin. Remove and mark carefully the position of the frame on the skin. I used my jigsaw to make the opening then file the edges smooth. Clecoed everything back in place. Install PG-228 on both sides. Positionned temporarely the false ribs and lay down the roof skin to get an idea of what it look like. Now I have to do some priming.....
