JD, I think you are dealing with the typical thought train that happens during the construction of that first drum....its called OVERCOMPLICATION. I can guarantee you can get a Weber lid to fit a drum in California, I do it all the time. I am not familiar with 110 or 85 gallon drums, but Id bet that you will spend a lot of time getting grills and other ' off the rack items' to fit those size drums. My advice is to bite the bullet and make the 50 gallon standard uds. I am sure if you follow the directions to 'fine tune' the Weber lid, you will be glad you did. In closing remember we dont build rocket ships... all it needs to do is burn mamal, lowly and slowly
"Assumption is the Mother of all F___ups!"