Thank you for the insight and compliments Cody, Tony and Ralph! After using the hatch the past few days, the seal has begun to relax and conform a bit and the fitment is getting better a little bit at a time. I think I'm going to cross it off of my list of concerns.
My apologies in advance for the lengthy update, but things have been moving at a very rapid pace the past couple of days. I've felt like a kid on Christmas morning getting to unpackage and install all of the remaining hardware and electrical components that we've accumulated. For starters, we got the galley overhead light and the ratcheting paper towel bracket installed:

After we got some light to work with, we installed all of our freshly polyurethaned drawers. On the left is the stove and water slide out on a set of locking drawer slides. The water container is a 3 gallon aqua brick and the stove is a camp chef. It also has room for a fry pan, pot, and a propane bottle. And, last but not least, a bottle opener on the face.
In the middle are two latching drawers. The upper drawer is a full 23.5" deep and the lower drawer is shallower to account for the battery at 14" deep. It amazes me how much storage space that these provide.
On the right is the cooler tray on locking drawer slides. A utensil drawer was made to go above the cooler but, unfortunately, will need to be remade due to the fact that the lid on the cooler that we bought doesn't actually sit perfectly flat on all four edges. Oh well. That's what you get when you try to build everything to such tight tolerances.



Next, we got the electrical box all buttoned up. We squeezed a lot into this thing but I'm very pleased with the way it turned out.


Inside, we have the fuse panel, a Noco charger, a main fuse between the battery and the fuse panel, and, obviously, all of the wiring that goes to/from the rest of the camper.
On the outside of the panel, I made the access door so that I could change fuses and access the charger. When charging, we can open the door and run an extension chord in to the charger from shore power. A big design focus for this was making sure that the hinges of the access door were on top. This way, if the hatch gets shut, the door can never remain open and damage the hatch or the electrical. It will always be pulled out of the way of the hatch by gravity.
Left to right on the bottom half of the panel is a tow vehicle charging cut off switch, galley light switch, battery monitor, and 12V/USB charging ports on a switch.
Next, the countertop storage divider was installed. It is full width, from wall to wall in order to look complete, however still provides access to the electrical controls. A fancy storage divider that is cut for our mugs/coffee supplies/cooking supplies will be made later on once we establish what items we're going to keep here will go behind it. Hopefully our electrical doesn't need any revisions anytime soon, because I caulked the bottom edge of the divider along the surface of the countertop in case a spill ever occurs.


And finally, the cabin interior is also complete. Door and fan trim got installed and we added some hinged coat hooks next to the doors. It is now ready for the mattress and the curtains that my wife made.
