My initial plan was to run the supplemental litter dam all the way to the floor of the enclosure, but I cut the drainage layer a little too tightly, and didn’t want to trim it again. But it turned out for the best anyway, as the door jamb meant I needed to shim the litter dam. I got lucky again, in that the acrylic was a good thickness, and I cut them out of scrap from the litter dam.

I bought this cutter for rigid plastics. It worked, but not any better than a utility knife. Score score score score score some more and more and more and eventually snap.

The litter dam, shims, and drainage riser are held in place with Lexel left over from a batch of AP cages. I am not good with silicone, my hands were coated. I didn’t know where the Goo Gone was, but olive oil followed by soap and water did the trick - the Lexel tube said citrus-based cleaners or mineral spirits. I know Goo Gone is oily, so I figured I’d try olive oil before turning to mineral spirits.

Everything in place, after this picture was taken I filled the space around the drainage riser with drainage layer trimmings:





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