Canadian Mechanics
In Canada we never use the wind signal at the end of play. In situations where the WH needs to know if the play should start on the snap the sideline official would communicate this with an inbounds (palms down in front of body) or an OOB (thumbs over shoulder) signal.
I could see problems in your mechanics where in the last few seconds you need to stop the clock and signal that it will start on the ready. You could easily lose precious time.
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