Thank you Deborah, and to everyone's follow-up responses too! A lot of positive endorsements for Animal Plastics, and it sounds like deservedly so. The long wait time is unfortunate, but both my BPs still have plenty of time and room to grow in their current tubs, so thankfully I am in no rush. (Sorry to hear that you've been waiting since August though, SVT Wylde. That's an ouch!)

I think I am leaning toward the T10 more than the T8, both to make it easier for me to reach in and clean, and because my BPs seem to enjoy roaming and climbing at night, so they wouldn't mind that extra height space.

The sliding glass doors sound pretty appealing. One of my BPs has a robust feeding response that sometimes rivals my boas, but his enthusiasm is NOT matched by his strike accuracy, so a sliding partition is probably a good idea, ha. I'm looking for an improvement in visibility compared to the hazy transparency of their current Sterilite tubs too, so I'd want to avoid acrylic if it tends to accumulate scratches over time with repeated cleanings.

CALM Pythons, I love the thorough breakdown and the helpful pictures. Your preferences seem to coincide well with mine, as I already use Herpstat thermostats and Reptile Basics hides, haha. Great tip about the butcher paper; I currently use paper towel for substrate, and was wondering what would function similarly well for a larger cage floor.

Would it be excessive to have both the Pro Products RHP and a belly heat source (either the default Flexwatt heat tape, or an Ultratherm UTH) installed? I live in southern California, so during our long and hot summers, my indoor temps are already sitting around 78-80F while the A/C fights to keep it there, and I don't know if an RHP might overshoot that. I was wondering if it would be reasonable to have just the UTH on during the hot months, and then turn on the RHP for the colder months.