Decided to shoot a bit tonight while I was smokin my gear. Sure glad I did. Come to find out, my lighted nocks (nocturnals) add five yards at 30_35 yards. I was shooting 35 yards and my shots were all low. Moved in to 30 yards with my regular nocks. Everything was fine. Shot my nocturnals at 30 yards, aiming at 35. Dead center. So if I use my lighted nocks, I have to adjust accordingly. I think for Saturday morning I'll use the nocks that came with my arrows. Glad I figured this out now.