Actually, I was talking about pulling the pins out of the hinges. Lining them up won't be a big issue, it's just a matter of putting the control panel in place, make sure each side of the hinge is lined up, and slide the pins in place.
Another idea I was kicking around is making slide in removable panels. There would be a door in the front of the panel with a lock. Once you open the lock, the front board would swing down, and you can slide the panel out.
The sides of the panel box would have two channels for the control panel to slide in far enough to allow the front door to close and be flush with the front edge of the control panel.
A lot more work, but really sweet if I could pull it off. I was even thinking about making a rack on the inside for "spare" panels, and rigging up DB25 connections that also slide into place when you insert different panels so you don't have to worry about plugging and unplugging wires.