How to Fix Drywall Holes. Cut slits from the sides of the hole, then thread a wire through a tin can lid and slide it in. Pull the lid flat on the inside of the wall, and hold it in place with a stick.
For those that don't have a lathe, there are jigs that can be built in order to turn a bowl on a table saw. You have to be sure to design and build the jig correctly, and have it where it will be securely locked onto the table saw itself.