Legal use of hand & arm in blocking?

[FTVMartin]

Best thing to do would be reach out to a local association and see if they wiould come to a practice or scrimmage. We do that here and it gives a chance to explain what we are seeing and not just throw flags and move on with the game.
We use this time to answer any coaches questions as well. Last year I was working the line at a scrimmage and the interior lineman lined up looking like a "V". I was able to blow the play dead before the snap and have the coach come look at what I was seeing so he could fix the line.