Joebl,
I thnk what Pat was saying is,
If you set to the 50 yard stake alone, you may end up throwing targets that are to fast to low, or with a tail wind to high and to slow, any number of odd combinations,
With the cronos and radar guns available you can set a reasonable target, that through the zone that they should be shot are the right speed and right height.
The first three years or so that I have played this game, I would get to the club that was holding the shoot, and after getting registered or while waiting for the window to open pace along with the target setters. It was amazing to see what very little wind can to do those targets, or how well they can be set in howling winds.
I don't have the rule book with me, what I do remember is that all the target setters I have ever watched, all said it's at speed either crono or radar, and within 5 yards of the stake what more could we ask for?
Al