More info
"Remove the boot chip and install the RBK00001 chip. Power it up.
Instead of waiting for the amber lights to come on, go to the screen menu, select Key Chip, "Apply Key Chip". It'll say 'Spin Reels to apply Key Chip'. ..."Key Chip Applied".
Be sure to select 'RAM Options' / "Clear RAM" to avoid a 'Key Chip Access Failure', if you've saved before. (it worked for me anyway) Then 'Apply' the Key Chip.
Then power down and replace the Boot chip...
When you clear RAM, the alarm will go off at restart! Just turn the reset key about 4 times through the listed errors, then it will ask you to push/hold the reset button on the MPU/board for 2 seconds. You should end up with at "Key Chip" menu displayed... edit params from there.