The AF-5400 can be built in panel or tray mount like our AF-3500 and AF-4500 displays. This allows them to fit in the existing hole in the panel.

If you want to save cost on the EFIS and can modify the panel here is a drawing that shows the difference between a panel and tray mounted AF-5400 and an AF-5500.
http://www.advanced-flight-systems.c...0%20Cutout.pdf