If there's something I have learned while reading this thread it's that you CAN in fact learn to manipulate coin flips. And now you're trying to tell me that's not possible...?
If you can place the coin on your flipping finger exactly the same way, place your hand in exactly the same position, use exactly the same amount of force, and control the air flow in the room you are flipping the coin in, yes, you can theoretically manipulate coin flips.
Best of luck to you in that endeavor.