I have a vinyl-sided outbuilding that I'm converting to a chicken house. I cut out a small door for the chickens to get into the yard through the vinyl siding with a circular saw, but the cuts were not neat; instead, chunks went flying off as the saw blade went through it, leaving a very ragged-looking chicken door. I'm thinking that using a saw blade with smaller teeth might help, or maybe using a sawz-all or jigsaw would make neater cuts. But there's probably a better solution out there. Any thoughts?