The one point I see missing is vocalizing your call.
If you say, "Hold," "Hit," "Push," or more descriptive things like, "Body," " You got em in the head," the preliminary signal is pretty redundant.
I can see stressing a hand check, block/charge, or selling a push OOBs, but most calls don't need it.
Your voice is much more important, than a preliminary signal.
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