Are you saying that it is not possible, or extremely difficult, to accurately determine if a broadhead shaft is or is not flying well without comparing it with the flight of a different mounted arrow?

What are the " variables" between the different mounted shafts that you suggest I need to know and understand to obtain the best performance of my broadhead shafts? The variables between the two that I do know, is that one shaft does not have wings in front, and the other does. Therefore, it is highly probable that they will react differently in flight. Being I hunt with the shaft that has wings in front, I do not concern myself with how the wingless shaft will fly once I have pre-tuned.

Why be concerned about how two different mounted shafts group with each other, when I will only being using one specific type to hunt with?