I used OT2 to select a set of arrows for my 06 Bowtech Tribute and make a sight tape for the HHA OL5019 I put on it. I made up the tape to between 15-68 yds., sighted the bow in at 20 yards in back of my house and then put the tape on the sight with the 20 yds lined up. Yesterday I went to a 3D shoot got out to see if the sight tape would be accurate at longer yardages. On the practice range at 30,40 & 50 yards the tape was right on for elevation. I haven't had the bow chronographed yet but I'll bet it's very close to the speed given by the software. By my paper tests the spine looks good too.