Does anyone know what degree of angle their guttler rollers are set at . I am asking as wox are sending me one to try to see if they improve closeing of the slot on a pillar laser disc hoe dd drill. What i am hoping is for them to pull a bit more of the disturbed soil back in over the seed row as well as firming it. I know you jd boys swear by them so thought it might be worth a try .