I had to order some 5/8 OD DOM tube for the door hinges. Ebay had some 12" pieces cheaper than a trip to Denver to buy a full stick. I would never have used 12' of it either. So while I am waiting on the pipe to deliver, I built the door frames. I used 3/4" 16GA tubing. Attached are the pictures of the doors frames in process.
Work on the cab has been slow. Finally spent the weekend getting the doors hung. Learned a lesson as I went, the door hinge pins have to be in line or you can't remove the doors. I was lucky and only had to move the bottom hing to back side of the slanting upright. Because I had already built all 4 hinges the same, I had to extend the bottom one 2.25". Now I have to work on building the latch.
Door open
Looks like a good start. I like the curved top. I picked up some LED lights similar to yours at tractor supply this weekend. They were on the clearance rack for $20. I used 3/4" 16Ga tubing for my door frames. Tried to keep them light weight so they can be removed easily when it's warm outside.