I keep mine around a quarter of an inch positive + or - , I shoot split instinctive, 1/2" positive would be my max, anymore and I might play with grip above center a little. I think a string walker might benefit having equal to negative tiller since there string nocking point would be lower. Of course there are a variety of ways to tune a Bow regardless of + or - tiller. Missing weight by 1 or 2 Lbs is OK by me maybe not others.