 I don't think that's going to make a big difference. Listen, if these things are wired correctly, you can certainly collect the energy, whether they are at grade level or on the roof. You know, the added complication of putting them on the roof is that you have to put them over your roof shingles or whatever roof material you have. And when ultimately that roof fails, you have to remove the panels to re-roof. So it does add a complicated level. I mean, how old is your roof now? Do you think you're going to replace it in the next few years?