Gen2 Prius Smart Key Repair (transferring key electronics to new key shell)

AN ALERT: The smart functions of the nice new-looking key do not work. The LED lights up, but the car does not respond. Apparently the circuit board was damaged in the transfer. If you decide to attempt this repair, make sure you have other key(s) that DO work first. Fortunately, I did the chicken dance to program two new keys before attempting this transfer. To make things worse, the key made by the locksmith only works after a number of attempts. He had to grind each side of the key separately and align manually. Prior experience with him tells me that he is not exactly a perfectionist. I won't use him again. I'm wondering if there are key machines that grind both edges at the same time without requiring alignment.