The model I did it with was a 2000 Evolution Mini.

You take the end cap off, push it into the lock just as you would a key, turn.

I can't verify or deny that this works with other models because I haven't had the chance to try.

I do think however that this is what everyone who is serious about keeping their bikes safe usually use - the Krypto site gives this lock a 4 1/2 star (out of 5) K-Tough rating. It is supposed to be virtually unbreakable.