Yes you are correct about the coils. The Sanyo Model was one of the last revisions to the Saturn Hardware so if you are looking for a US system they have a date of manufacture printed on the bottom and I would try to avoid anything from 1997 if you want to stay away from the Sanyo systems. I did just recently get a mod chip successfully installed into a Sanyo system though so if you end up with one it may not be the end of the world.