you will be surprised how little you will need to move things IF your bow is tuned. maybe some elevations adjustments, that's all.Willdorf said:I was also getting curious about what might happen if I change my spine on my arrows. Right now I am shooting a 400 spine gold tip hunter. In looking at the new arrows I have found out I should be shooting 300 spine. If I switch to the stiffer spine will it affect my tuning or should i just have to move my sights? I am shooting a Mathews creed 29" DL and 70 lbs if that helps. the 400's shoot well out to 50 with G5 montecs. Haven't tried out farther yet.