"The two apparently were manufactured within 3 months of one another."
I'd say 9 months. The firmware revision from 2.2 to 3.0 is the 3 months you mentioned and from what I could gather ( which may or may not be correct) mainly changed the algorithm for handling carryover and unless you're without a lock for a long time you'll not notice any real difference. I wouldn't worry about it. -Arthur _______________________________________________ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.