Bummer, I already knew about the -nofee 1.  Unfortunately, that switch slows it down to about the same speed as T-Rex 14.9Mh vs. 17.2Mh.  Lolminer & miniZ were both slower still.  Oh well, it was worth a try.  I hadn't used Claymore in years, but recently re-discovered it on one of my old backups.