It's been a couple of years ago now so I won't have photos or anything.
I bought 2 new lock tumblers with keys from my Honda source and the keys were different from each other and different from the ignition.
There is only four different inserts in the tumbler. They come apart easily, a circlip holds it together, remove it, withdraw the tumbler, remove the inserts paying attention to keep them in order, use your key, compare it, the notches, to the tumbler inserts, with the old key compare it to the key that came with the new cylinders,. It is obvious then what order to put them in. Good luck, I don't know how else to explain it. It's not complicated. Be brave, you can do it.