Your 796 did not come with a red key, only two black keys.
Indeed! I read a lot of posts about guys that have lost the red key and such... I didn't know when they made the changeover.
I think mileage is stored in the instrument cluster, as well as the secret code which is shared with the ecu.
I'm not certain, but you'll find out when you start switching parts...won't you?
Prior planning prevents urine-poor performance... I like to know what the expected outcome is supposed to be before I start unhooking things...