Not yet, but sheet metal work itself seldom goes a year without me building something, so it is inevitable.
I just have too many other projects to "clean up" first.
Are you printing directly on metal, or on something else applied to the metal?'
Closest I've come to a tin build, is a Marx Commodore Vanderbilt to Crusader bash with .040" (1.02mm) mirror stainless. Talk about a "hard" metal to work with, drill bits dull themselves looking at it. I bent up (ruined) a small metal brakes clamp edges with it too 
It still needs some finishing parts added, and freshened paint.
Here, Bruno is seriously guarding it from the Swiss Bandogg, named "Puppy". He likes watching my trains with me from atop his ottoman.
