We had a bathroom remodel done about 6 months ago. While my wife was cleaning the tub she bumped the overflow cover, and it fell off. I looked at it to find the piping didn't line up with the tub opening and they jury rigged it. They pulled the PVC drain line to the side and shot drywall screws in it to hold it in place in the tub opening. If they had used stainless screws in place of cheap drywall screws it might have lasted much longer. I pulled the access panel off to get to the pipes and figure out a way to repair it. My thoughts were to make a flange that would offset the opening in the tub to the piping to realign it. Just eyeballing it they looked to be off centered by 9/16" to each other. I got a piece of aluminum and put two punch marks on it 9/16ths apart. I set the plate up on center to one of the punch marks in a four-jaw chuck on my lathe and bored a hole halfway through the plate. Then I flipped the plate and repeated the process on the other punch mark. I had to cut out the plate where the holes overlapped each other for flow and leave some areas for screws to thread to. I guess it turned out ok for a hasty repair. It sure is handy to have a mill and lathe on some of these repairs.