 So I took those walls and that corrugated wall. I said to my engineer, I said, hey, I want to build a wall out of that corrugation. I want to take a flat bar, put on top, one on the bottom, weld them together, create an I-beam. And then I want to see how strong that is. So we started testing that. And then I thought, well, you know, we need let's put wall studs on the outside. So we got a space for the insulation and we'll put one on the inside. So we've got a place to run the wiring and plumbing and put the drywall.