Good post Gerry....
I use 50% and a shuttle of .005 and the backlash is rather hard, by that i mean almost instantaneous.
I suggest one play with the settings starting with 50% ( i don't like 100%, but that's my nickle on it ) and say shuttle of .5, then .05, then .005 to see the differences. Then up the % to say 75%, and again to 100% with the the different shuttles.
BTW, you may want to see the same affects when using exact stop and constant velocity. been a while since i played with the compensation.
RICH