{HEAD ~ Size deviation} can be {TAIL ~ less than about 10% rms}, less than about 9% rms, less than about 8% rms, less than about 7% rms, less than about 6% rms, less than about 5% rms, or ranges between any two of these values 
{ HEAD ~ Size deviation } can be { TAIL ~ less than about 10 % rms } , less than about 9 % rms , less than about 8 % rms , less than about 7 % rms , less than about 6 % rms , less than about 5 % rms , or ranges between any two of these values
HEAD HEAD HEAD HEAD HEAD HEAD OTH REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH