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don't see much point in having two similar setups until we actually need the second one.
Of course, by then, it will be too late!
As Abe Lincoln said, "You can't have too many backups of important data!"
Seriously, I'd just uncheck all those apps except maybe Contacts, and, hopefully, keep that "nag" screen away from you eyes! I finally did something similar on the
Yosemite Beta I'm running on a spare mini. Almost every startup had that irritating "we can't sync/contact the Mother ship" window. I finally gave in and signed in.