I have... the mechanics manual isn't really specific, was wondering if there were generally accepted signals. For example:
(from mechanics guide)
Count Team A players and give appropriate signal to the R
Count Team B players and signal other deep officials
Signal to R, ready for KO
Here's the ones I have, I just want to make sure there aren't any more commonly used ones (regardless of the signal, as you stated that could vary by crew) that I don't have listed here... we do use radios on Fridays, but we're not going to use that to state we have 11 on each side of the ball, for example.
4th Down Fumble rule (illegal procedure signal)
Subs (Iron Cross)
Double sticks
Current Down
Widest man off LOS
Backwards pass