Another requirement for this case is a hidden door latching mechanism.
Look Ma! No latches!
A length of .125x.75-inch flat bar was bolted to the bottom of the door to act as a lip that will hook into the u-channel along the bottom of the case, for example:
Along the top of the door, there is a piece of angle with three "hooks", which were routed out using a cobbled together router template.
A thick piece of flat bar was filed down to where it'll slide easily inside the u-channel along the top of the case. To that three "posts" were bolted to it. When slid forward, the posts will engage the hooks.