So I took some advice and made the hole bigger and was able to get the new skimmer fitted in, but now I have to bend and fit in the rebar. I also worked on all the spalling of the bond beam and was considering using rebar in staple shapes so this doesn't happen again. It has been so much work fixing this this weekend. What would people recommend to prevent the spalling under the coping in the bond beam? I know I have to leave a gap with foam and waterproofing between the back of the bond beam and coping and the pool deck like in the drawing I recently posted. I had to drill out the a lot of the bottom of the skimmer to get it to fit.