It's a 2016 hard top. I went with a newer one due to the larger field of vision. I really like your hinge design, and was looking at making something just like it, but using door hinge pins with brass bushings as the pivot point as opposed to bolts, unless you know something about going that route that I don't.
Also with the hinges you designed, I was looking at having the door pieces of the hinge extend the full width of the door for mounting my 60" hi-lift horizontally as well as quite a few jerry cans or possibly even use VP Racing fuel cans instead due to their ease of use when refilling the tank. The hardest part or that is compensating for that dreaded curve that the back door of the JK has some unknown reason.
In your initial trials, do you see any viable way to make the factory hard top modular by cutting at all of the "seams" and adding flanges to connect the top and sides?
To counter the curves in the side pieces, I am probably just going to make a mold off of the side themselves and duplicate the panel as a solid piece, and still debating whether to have a top or bottom hinge for the access panel.
My biggest issue is relocating my spare. I am currently running an Expedition One rear bumper and tire carrier, but I want to get the spare off of the back to have more space for fuel and such. I don't want to put the spare in the vehicle, because if I have to use it, I definitely don't want to put a nasty flat tire inside the vehicle. Where we predominately go play, one of our biggest issues is low hanging, large tree branches and vines that snag everything. Due to that issue, having a 12.5" wide tire on the roof can bring with it a whole new set of problems. One idea that I'm playing with is putting the spare on the roof, but recessing it into the top 6-8" so that there's only 4-6" extending above the roof line. The biggest hurdle in this plan is the rear crossbar, as it will interfere, so roll bar modifications will have to be made for clearance. I've measured the top and all of the "blind spots" or view limiters and it appears that having the tire recessed 6" will not reduce vision out of the upper part of the rear window, and going 8" won't affect rear vision enough for me to worry about it.