Man, this thread makes me kinda nervous for my DSP5000C "smiley" center. I run it pretty heavily with Trifield and its serialnumber seems to match up with the problematic units.
Last time I tried opening it i just couldnt get the back panel off at all even with all the screws out. seemed like it got stuck from sitting all these years. I should probably give it another go to make sure everything is okay in there.

G65, DSP5200SE, DSP5000SEHC, UHD722, 210