Hi using a new Mybo Revolution with drop away rest set at 49lbs with an arrow speed of 245fps (using chronograph) using Skylon Precium 450 spine arrows 29" long with 125 gr break-off points. My issue is that it paper tunes a perfect bullet hole both fletched and bareshaft. I then French tuned and walk back tuned. Made small adjustments left and right (nock was height correct). Checked paper tuning again - perfect bullet hole. BUT when I bareshaft tune at 30m the bareshafts fly poorly and end up quite a lot right of the fletched shafts and were nock left - a sign of weak spine. I've made sure that is no face contact. I then took one fletched and one bareshaft and changed the points to 80 break off grain but if anything the bareshaft is worse and the fletched shaft not much different. The skylon spine chart says I have the right spine for the arrow length and speed although in my experience with arrows for my barebow they do tend to suggest weak. Before I cut them down I was wondering if anyone had any ideas.