DC,
I know the elastomer coupling adapters dont look like much, but I have an off center spliced , septic line at my river place. I have a 4" elastomer coupling adapter that I installed 10 years ago and its still solid. For the few dollars that I spent for it, it has greatly exceeded my expectations. But, like you say, perhaps there is a better solution out there. The adapter is a quick and inexpensive repair.
Charlie
