"Ah, Ace! Your pedantry is one of the things we all love about you!"

I'm quite aware that most people find it annoying, but it's often necessary (http://xkcd.com/386/) :-D

A time-traveling door - not an entire room, just the door - what an imaginative concept! In the wrong hands it would be clumsy, but from your description, I gather it was done deftly.