Cover for Hach DR3900 Analyzer with holes for tubing

I designed this cover for the Hach 3900 series water analyzer, commonly used in water treatment labs.  This cover allows plenty of headroom for testing hardware to be inserted into the analyzer well and includes two holes in the side that allow tubing to go through the cover during testing.  The cover fits the unit with a form-tight fit.  ABS/PETG/PETG-CF works well for this cover.