I think BITS has hit on something important here.... WHEN DOES THE BALL GAIN INBOUNDS STATUS?
I want to say that inbounds status is only gained once A1 lets go of the ball... to the contrary there is the casebook play (7.6.3F) of the held ball with A1 out and B1 in. Is this contrary?
Perhaps this is a critical viewpoint that will settle the matter?
The ball is never inbounds until A1 lets go of it. And with the extension of the rules (CB 7.6.3B) A1 may not handoff to A2 - he may inadvertantly let B1 take it from him (act of defense) but may not offensively hand the ball to A2.
Hopefully, after all this discussion I will be sharp enough to let A2 touch but not take the ball from OOB A1... when it happens in a game. I'll kick myself if I call it differently.
Was that a 1/4 inch pass A1? I thought so...