I developed problems similar to yours about 6 months after surgery. I had four dilation procedures about three months apart that appeared to solve my problem. My uro offered the surgical procedure as an option but I was content with the simple dilation procedure. I developed another flow problem after SRT and went back for a 5th dilation. It seems to have worked so far. I avoided surgery because of the potential for incontinence problems. The dilation procedure is certainly uncomfortable but I don't mind doing it if I can get several years out it.
Carlos