IMO, Not bad but try to listen to others about writing it down.

I think it's not that much as well. You're just trying to scatter your keys and as long as you're the only one that can access all of those, I think that's not even a problem.

The unique idea is about the carving and you shouldn't tell this to anyone that you can't trust because that person might go through your closet and has the intention to look and copy for it.