PROS now defaults to pi bins for spectrum extraction.
ALL normalization factors are free parameters, however.
The lowest level bin should NOT be used in ANY fit, as there is no response for this bin. Therefore, use bins 3-34. There is a problem in PROS due to improper handling of the precision. The column names in the table are the actual grid values, so a lack of precision aborts the table creation because the software believes a column already exists. This problem arose before, and the PROS people thought they had fixed it.