One set of interlocking carriage doors. I made similar doors in the past which turned out well but were insanely heavy. I also had trouble sealing them up as they were flush with the inside and outside. These have 1" inset on the inside so they can close into a frame and weatherstrip and 2 3/4" inset on the outside to keep the weather off the top of the doors.
This time I used 2x4 for the outer frame with 1x4 reinforcement and 3/8 plywood sheathing screwed every 8". They are about 60 lbs now without the insulation, inner skin and outside finish
Also made them interlock/overlap 2" to give me a place to seal the space between the doors and allows a smaller gap for the swing radius. There is a 1/2" gap (front to back) for weatherstrip in the overlap and 1/4" between the doors for swing clearance. I can increase that if needed or preferably, radius the inside corner of the overlap door and keep it tighter on the outside. Either way, kept my options open for fitting them.
Looks like they fit well, the edges are plenty thick to allow for removing material if required. Next challenge is to find hinges. I found the hinge the type of hinge I need - raised barrel hinge but they are tough to get. An easier solution is likely to bend some in the press to get the "raised barrel" effect, then weld on another hinge plate to get the required distance for the thickness of the doors. The raised barrel (pin) spaces the fulcrum away from the wall so the pin doesn't need to protrude past the door frame - my doors are inset over 2".
Thinking about a new signature line: Measure twice, cut once, buy extra materials.