Thanks for your most interesting answer! I was going quite crazy on this. The letters are meshes directly placed in the level, of which I check the display name the way you saw. How exactly could I have my blueprint identify them in a way that wouldn’t differ in editor and package? The name variable sounds good, but I’m having trouble figuring out how to set it up. I’ll look into it.
EDIT: Nevermind, I found a way to fix this, by getting the object name instead of the display name, and making sure it matches the ID of my meshes! A great thanks to you!