You forgot to make them crawl into the wing wearing breathing ppe on a hot day to seal an integral fuel tank.

On a side note, I just changed the oil and filter on a Toyota yesterday. The only pain in the ass about it is that the damn mechanics completely ignored the torque requirement and overtightened the cartridge housing. I had to use an impact to remove something only supposed to be torqued to 18 ft lb. Otherwise everything is easy to access.