I always said that, when Unicomp made a tenkeyless, it would be a day-1 purchase. I'm typing on the "Mini M" right now. I had an actual, real, IBM Model M on my first job, and loved it. And you're right, the F switches are a little different. Less clicky. I find them less satisfying than my nostalgia. I had an actual tenkeyless IBM model M briefly, but found it unusable for programming without a third modifier key for ⌥.