how abut a little safety net under the unit?
Great idea! I need a safety net around everything I touch!
Just last evening, I was looking at the edge of my temporary layout, and the thought of some sort of safety net came to mind. Do I think my trains will jump the track into the chasm below? Not as likely as I drop them trying to put them on or off the track!!
Your idea is very good, because sure as shooting someone, namely 'yours truly' will bump into the factory mount and knock it off. I keep my hands in my pockets when visiting layouts, and then bump into controllers anyway.