 basically like or oil change you go you like you dislike how can i say this are you doing it more frequently than you would a car for example like there's just a lot more expected before you put an aircraft in the sky yeah i think i mean i've definitely read about that as well that it certainly is it requires more yes attention checks things of that nature yeah like um do work like you go back into the aircraft and see what you missed what you didn't screw in what you