I recently purchased a 48" sinclair hc round sign porcelain I want to place it back on a pole but I dont know the type it was originally hung on I've been told that it was a fluted pole that was tapered 5" at the base and 3" at the top Is this correct? also were the 48" signs hung by the same size as the 72" I've heard talk about major and minor poles. could anyone with insight on this give me a reply thanks a million