DIY racks vs Rhinoraxx, boaphile, animal plastics, etc

I know you've already decided but I figured I'm chime in anyways.

I use RBI racks and the CB-70s come with belly heat like the Boaphiles. They are both great racks and I don't think you can really go wrong. RBI has a bit quicker turnaround than Boaphile, and Rich's customer service is second to none in my opinion. He's a great guy to work with.

As far as the footprint on the CB-70's goes, they are very close, and I can tell you first hand my ~3000g female has plenty of space in her tub.

I'm sure you'll be pleased with your decision regardless.