Just a tip on the TIG setup: Use 2% ceriated tungsten. It is almost impossible to contaminate the tungsten even when you "stall" the tungsten in the puddle. Not that I recommend doing that but if you accidentally do it, just pull back and keep going. The high frequency what little bit of contamination there was(black soot looking stuff) You'll never use another tungsten ever. It is not nearly as forgiving on stainless or steel. There, 10 cents worth of free advice.
I like the storage in the lids, innovative. What is a set of panniers running? Size is about 15x20 and say 10" wide.
And why not add a "tang" to the hinge pin so the lid will site level to be used as a table or such?