Each team should get 1 challenge. If they are right, then they get to use it again. That should keep the whining down during the game as well. Why complain about a call when you can challenge it? And after you lose a challenge, your complaining credibility is destroyed.

The variant I would suggest would be that they don't use the conclusive proof to overturn like they do in the NFL. They should just have a guy who instantly watches it and gives his verdict. The whole challenge should take at most 30 seconds. The replay official should be sitting at a TV with full rewind controls.

And I would suggest that any call worthy of a whistle is challenge-able. 3 in the key, push in the back, charge/block, foul on a shot, travel, etc. Out of bounds calls would also be in play.

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"Everybody knows how Sheed felt when we went small, but he's buying into it." Rip