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Smaller diameter poles ..in older ice hubs and hunting blinds were fairly common for issues ..both the poles and the poles ends and hubs sockets were troublesome . I believe since most went with 11mm poles and different socket design/technology its less common . Just don't force any thing when setting up or taking down .
I saw a thread some where, maybe on IS, where a guy showed how to make replacements out of fiberglass fence posts from TSC. I have a broken one on a hunting blind that is broken that I need to replace.
HW Diehard Thanks for the I link. I will have to look into that