Hi Pete:

That's what I thought but seems to be inconsistent with my Miller Champion 6-lever lock which is listed as unlimited while the "Champion 4-lever" is "120 key changes", then on pdf pg 34 "Empire 6-lever" is "12 key changes".

From what I've read the 6-lever locks have 6 levers and each lever can have up to 6 different notch locations. So it would seem that the maximum number of key changes can be 6 * 6 = 36. Maybe less if the key can be inserted upside down.

Maybe the Champion 4-lever has 30 notch positions on each lever?

I can see how the number of key changes can be less than the maximum possible, but don't see how there can be more than the maximum and "unlimited" seem way to many.

Have Fun,

Brooke