Exactly, Wally! King Cages USB mounts work fantastically. Cotton bar tap on the tube to protect it, snug them up, and mount the cage. I could put a Many Things cage there and put a 40 oz bottle (a 64 oz might squeeze, but it would be snug, at least on my prototype). But I just have an Iris there with a 27 oz bottle (better for day rides and easy access vs. working the straps, though I don't find them cumbersome save for the undertube mount that requires defying gravity. Grin.
With abandon,
Patrick