Originally Posted by rleffler
I believe all 4500s used the panel mount tray to help support the EFIS due to its weight and depth. The newer models are much lighter and about half the depth.
The early 3400-3500-4500s were rear mount/panel mount. Later on AFS made a tray mount version available. I have had all versions and did send a picture for review showing a no flange rear/panel mount 4500.