Had a chance today to go look at top and here is what I know and saw. Lid is all one piece of 1/8" aluminum. It has 2 bends on the sides and then the front is bent as well and the only exterior weld is the 4 corners where the metal meets. Overhang is 1". Total height is 5-5/8" including overhang. Finished top surface is 47" wide by length of trailer.
Gas struts are shown in pictures and are stock items that fit a Durango. Available at any parts store. Struts have a weld support in lid and are bolted to trailer with backplate. Handles are standard items screwed to metal.
I have asked Adam to work up prices, but for those interested the question will be "with hinges, struts, latches and handles" or "just the lid". It will make a price difference.
Lid comes off by disconnecting struts, opening lid all the way and sliding to the rear to disengage hinges.
I asked Adam on the weight and he says the 2 of them in the shop can pick it up and he estimates 50 -60 lbs.
Adam is at least 2 months out before he can start this project and he would like to do them all at once to save time, money, and shop space.
Thanks to Brent for leading the way on this and having one built for his trailer.
Let me know if you are still interested.