Last night, I took the time to set up the 'enclosure'.  I put that in quotes because, as I note in the project details, the sides are open to the air.  Long term, I'l probably have to fix that, but I'm going to keep it as-is for a while.  The enclosure is just two pieces of acrylic.  I cut them to size on my bandsaw and then drilled holes for standoffs, wire ties, bolts and buttons.  I did learn as I proceeded; specifically, a split point drill bit is way better than a brad point drill bit.  If you don't know the difference, you're probably OK using whatever drill bits you have laying around, as most drill bits you'll buy are split point.  However, for the sake of posterity, just know that a brad point drill bit causes acrylic to chip out at the exit hole.  Live and learn :)