Well, after throwing $35 worth of lucite and eggcrate into my dumpster in an attempt to cover my tank, I can finally claim victory!
I managed to finally cut/score (and snap) 2 (nearly) perfect pieces of eggcrate to work with my hinge and HOB equipment so I can lift my lighting housing/capony and open the top of the tank to feed/test the tank.
To all who fought with acrylic tops, live vicariously as I smash some scrap eggcrate...
(cue up Wagner's Ride of the Valkries)
SMASH! SMASH! SMASH!
(scary thing is I'm saving some scrap for that future problem that always seems to happen)