Did the cartos used to
thread ok on the batts? Do you have another 510 battery to see if the threads on the cartos are ok? Or do you have another carto, clearo, atty that you can try on the eGo and Spinner to see if they fit?
If it's the battery threads chances are you got cross threaded, otherwise they wouldn't wear down that quick .. the spinner hasn't been out long enough for that to happen, although eGo 1100's have been around a while but I have Joye eGo's that have been around longer without any threading problems..... Hope it's the cartos
