Quoted from Gotfrogs:
So I guess LE owners have to remove one of their special insets to add this QR reader if they want to add this feature to their machine? I wish they would have taken another route. Scorbit does the same thing but does not require a reader on the pinball machine.
Stern won't do that much of a user involved install. They will likely sell it as a full apron that replaces your apron similar to the UV kit for Stranger Things. I don't see them sending you just the QR scanner for you to install on your existing apron. I could be wrong.