I used to have my crammed-to-the max A2000-040 rackmounted - I modified the original case. Then I did some trick stuff for a 17" Illyama monitor and the two of them occupied 12-space rack case.
Maybe your situ is different though; I'd suggest looking at just getting a foam-lined flight case without the rack rails. These can be had in a lot of configs, are made by many companies, and some of them make "soft-hard" cases as well.
