Boy, the search feature of this site is sure disappointing. I typed in "Walk Back Tuning" and came up with no responses/matches! I have a new Vectrix XL. It is shooting the best of any bow I have ever had in my hands. At 20 yards. But as the distance increases, the groups stay tight but shift gradually to the right - at 70 yards it is almost 6" to the right. If I remember right, the arrowrest needs to be moved the direction you want the the long range group to move? Left in this case? Thanks. Roskoe.