I've never looked into those before... interesting. I bet one could hide nicely inside one of your overflows
Question about the 120 and 300 background - how far out from the back of the tank do they just at their farthest points?
I really love how they look, and I love that they hide the equipment, but the reason I hesitate to get my own is that they'd occupy quite a bit of a 24" wide tank. I'd love it if there was one that was thinner but still hid the plumbing and heaters. Heck, the tank where I'd really like a nice rocky background is actually an 18" tank. Would you ever dream of doing something like that if swim space was at a premium?