i too do them by feel. the first couple times i ever did wheel bearings i tried following the torque specs and those couple times the wheel bearings failed within a month. the outer nut how ever i always make sure is very tight, at least 150 lbs because i have had the nuts loosen up too. after you are done with one side, (with the caliper off)spin the wheel. it should spin fairly easily. if it stops quickly the bearings are too tight. you will get the feel with time