This last summer I found a great deal on a PUP. It needed a roof overhaul. There is tons of help on you tube. Originally was going to reuse the aluminum jacket. I built the new roof then tried removing the aluminum from old roof. That was not a success. One problem area I found was the rounded corner. It’s just foam from the factory and on you tube there was a video of a gentleman who used a rounded post. Was about to steal this idea but had a thought. Here was my idea. Tell me what you think. 4” Black IBS plastic pipe. Cut down with jigsaw.