What I'm trying to avoid is abruptly resetting the clock from 12:06 to 12:05 all at once. Instead we want to slowly turn the clock back that one minute, but spread the changes across several hours or days.
I think the "-x" option may be our solution; I R'd the FM and it says:
"...If the -x option is included on the command line, the clock will never be stepped and only slew corrections will be used."