 It makes a big opening, relatively long-lasting, but they do have their drawbacks. You're not going to have a great weather seal for these new conditioned buildings. You've got to get out of a tractor and muscle the door open. And we're seeing more and more buildings go with either the large sectional overhead-style doors or even the large hydraulic doors. And that's actually a technology that's been borrowed from the commercial airplane hangar industry. Those doors can span sometimes up to 100 feet. For Profit Matters, I'm Dustin Hoffman.