[MrUmpire]

Originally Posted by ozzy6900

I agree with the balk call here. Once F1 brings his hands together and stops, he is set. If he stares in for the sign, then moves his hands closer to his body, we have a double set.

However, if F1 brings his hands together as in the OP and then leans in for the sign, you must call the balk right then and there. F1 has come set, then made movement that was not delivering the pitch or attempting to make a play. In this case, do not allow F1 to go any farther without balking him.

Ozzy, there is no separate balk rule about a "double set." Both of your examples are enforced under the same rule..8.05(a) and in the pro circles are known as "started and stopped".