Thanks, I'll keep that in mind if the current method I'm using causes me trouble. I'm not THAT worried about the remote chance of a map bricking my Garmins since my Garmins are old units bought used/"broken" for $5-$10 a piece. I tested the method on the cheapest units first and when they worked fine, I did it on the rest, so I assume I should be OK.

But what's the process you use to unlock a map, once you finish in BaseCamp, so BaseCamp allows you to select the SD card or the Garmin? Don't they ask for unlock codes?