I guess this hatch should technically should be called an ELT/Strobe/Autopilot Servo/Elevator Bellcrank access hatch, because it will allow some visual access to all of those items. Today, I finished the project. I completed the shaping and filing of the cutout, cut all the hinges, stiffener angles and spacer pieces to size, and cut the door down to its finished size. Next, I taped all the components firmly in position and inserted the hinge pins while I back-drilled the hinges. I bent the forward edge of the hatch slightly to get it it seat flush with the baggage floor. Then everything got sanded, cleaned, prepped, primed, dimpled, and riveted. Finally, I bent the hinge pins into the necessary shapes and drilled the "keeper" holes for them in the wall below them.
This project was a nice one to get me going on the project again. I think it will be a very useful modification. Thanks to the guy on VAF from whom I stole the idea! ;-)
[Hatch design superseded.]
Photo 1: Hatch, assembled. It's held in place with two removable hinge pins.
Photo 2: The lower end of the pins go into the two small keeper holes in the baggage wall.
Photo 3: View showing the construction of the hatch and the shape of the pins.