Ok I finally got around to finishing my lid. Things you may notice
The handles also control the exhaust by a simple quarter turn you can open or close each.
Flaps are held tight by a piece of flat stock. It also doubles as a support. Without it the handles felt loose. The flat keeps it all tight. It took me some trial and error to figure this system out.
Welded some nuts on as stops. Also a lid hook.
All this looks kind of cluttered underneath but clean on top.
My UDS is better than your UDS...