Drawing reference line for the holes in the fuselage to position the door halves. Positioned the clecoed door halves on the cabin opening. Used duct tape to block the doors and drilled the holes in the door at the reference lines into the existing fuselage holes. Only in few cases i had some misalignment and i enlarged the door holes as indicated in the construction manual. I had to trim in few cases the fuselage opening in order to allow the door to sit properly.