Yes your right it may be obvious to you but how obvious will it be to a laymen with the right handling and presentation they think it just appeared! Think about it you don't touch the deck al you do is wave the hand over the deck ad the card ust appears how obvious is that to a laymen.
Yeah, you did it fairly smoothly, nice work on that. It is a very cool method, but I don't think it's worth $20 either simply because of how hard it is to not perform it in a way that gives the method away. (I worded that oddly, but you get the point )
Uhm... I'm not familiar with the Neo change, but it looks exactly like the Erdnase change method #3. It also could be the One handed transformation #2 with right hand as cover.