has anyone built their own enclosures?

Professional boat builder, we tried GE SCS 1200 silicone it is used for building aquariums and tried 3m 5200 as well it also failed and it is a structural adhesive. The 5200 didn't fail quickly but it did fail (I think it was 2 years). Have you ever seen plexy move in water? Try it it is unbelievable how much it cups. Have you had a spill yet?

I'd suggest the PVC bottom it works like wood and can be fasted with silicone and screws it is hard to make waterproof but leaks are off the side and slow.

I have spills all the time, in fact I have the same set up in my Burms cage. He is over 14 foot and it has held up to him peeing on it for 2 yrs now, and that's a lot of fluid.

I understand it could always be better designed but if the cages are just sitting in my shop and not selling because of the price it don't matter if I line it with gold. :D

Pvc is not very expensive but it is your design. I know we has all sorts of issues with plexy and liquids. Just a thought and comment. Question are they UL approved ? I know a someone here whom was asking me about custom caging lots of it.

Nope not UL approved either, once again it all goes back to keeping the prices of the cages down. Noone want to pay extra for me to ship the cage to UL for them to run tests and tell me the plywood is safe.Then they have to pay additional shipping to get the cage to them.