Jay, you *are* the astromech god of the 'Yards! Thanks for the effort you put into this review - *very* well-done and informative.
I'll be buying one. Or more. The uses to which I will put mine will be showcasing the chest-arm, rather than hiding it, so a poorly-fitted door is not an issue. That, or I might be copying that chest-arm and trying to built my own ultra-R2.
Now THERE is a project! Think I'll start with a metal lathe.....