Hello again. I like to patch large holes and old recepticles on the cheap where I can get away with it. What I do is to make a backing patch by cutting a piece of drywall slightly larger than the hole. I make a small hole in the patch and apply adehesive to the front side. I pass the backing patch through the hole then pull the adhesive into contact with the back of the drywall. Then, I cut a drywall patch as close to the shape and size of the hole to be filled as possible. When this is stuck to the backing patch the hole is basically filled. Drywall compound and a little sanding does the rest. You can patch holes of any size using this method, and the repair will be invisible and strong.