The script uses two sight marks and calculates an initial sight mark for all distances.
The calculated mark will not be accurate, but should provide a good starting point.
The following calculator is for extrapolating sight marks for all distances from only two. It’s not going to be accurate, but may be useful as a starting point. It assumes that sight position is fixed, so if you use short distances the predicted marks may go off the bottom or negative if you use marks for a long distance. Let me know if you find it useful and don’t blame me if you lose your arrows!
Congratulations Bruce on winning the HGAC Coach of the Year 2009 award