With a lazer engraver, the cuts would be identical. My thought is to just add the ring to the boot disc. The charge for lazer engraver time should be $60 an hour. It should take about a minute to do each cut. Then use a label to attach the inner boot disc and the outer ring. *IF* the boot disc ISO can be worked on and gotten to boot everything, anyone who has access to a lazer engraver would be able to make the discs to sell for about $5-$6 each. How many people would be willing to pay $15 or $20 for a fully working boot disc? They wouldn't have to open their system, wouldn't have to mess with any solder whatsoever, and wouldn't need to worry about which model Saturn they have.