Thanks for the suggestions; in regard to RCS placement, they were already dead-on center of mass for the probe at 50% monopropellant. I tried your other two suggestions, fine control seems to have no effect on RCS use, and using only gyro rotation eliminates the jitter but worsens the probe's ability to target vectors correctly. Also going back to your idea about the klaw I relaunched with it unattached and that had no effect.