Hi, Steve is definately on the right track. Planes went out with slide rules and hand cranked drills. The only thing I could add to Steve's is this little trick: If you are going to saw off apprx. 3/8" from the bottom of the door, then mark your line with a razor knife instead of a pencil. Score it a couple times and then saw your door. Keep the blade a little bit below the razor cut. Then bevel sand the corner with a sanding block. This way the razor cut stops the saw from splitering the wood and when you bevel sand it, it removes any wobbles in your cut (at least the appearance of any wobbles). If you don't prime and paint the bottom of your doors when you are done, you might as well not put them back up, but just take them directly to the dump, because that is where they will end up when they warp like a pretzel or swell with the humidity. Also, PLEASE double check that you are cutting the BOTTOM of the door and not the top. THis is right up there with measure twice and cut once. If you accidentally cut the top of the door, they your next trip will be to the dump. Good luck!