My windows were 6-800 each. I did it myself. It was super easy with a friend. Will need someone inside and outside. The prep of the old windows removing the glue was the hardest. That took a couple hours. The install taking our sweet time to not make any mistakes took an hour each. There is about an 1/16 of an inch all the way around where the old frame was wider than the new frames. I had one that showed up broken, their costumer service was second to none. I had a new one in about 3 weeks. Hope this helps, reach out with any other questions
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