I'm glad I stumbled across this thread ... I have been looking around for a durable solution for beer crates (with dividers) but hadn't found anything I liked yet. These match what I want for bottle crates better than any of the ideas I had thought up!
Thanks for the detailed write-up. I haven't done much woodworking for about 15 years, so I had been hesitant to try to design and build something on my own; this gives me the perfect project to make something extremely useful and get some practice for the other projects further down my list!