I think I started it upside-down so the key, in my version goes through the starting ring… anyways, the chains on round 3 and the skip I am guessing that is made for the hole where the ring passes through, the problem is that on my key(and maybe because I was doing it upside down the hole would arrive just a couple more rounds later…

Anyways, I have used the original pattern just as inspiration and reference/idea, I kinda of improvised the whole thing, and so should you, because it’s just a small key, it shouldnt be hard :)