i would have gone with black PVC, but your plans still look great Dave!

how many gallons or quarts is in a 48x12x24? those are other ways herpers seem to measure BP enclosures. you could keep it a 48in and clutter it up. i think it really depends on what you plan to put into this size enclosure. a juvenile BP, adults, breeder animals? Boas?

i see that you already have dividers in your plan for other 48in units. at the very least, you could make more of these if you're still concerned.

can't wait to see the final product.