That's great, you have your shelves beautifully organized. Everyone has a different way of attacking the problem, and I haven't seen anyone do set tags on the shelves before.
Unfortunately, I have decided not to continue displaying my sets on the shelving units, mainly because of the lack of space and the cost to continue buying the storage units. I have stored most of the Playmo in boxes, and have slipped them on the shelves. Pictures will follow!
Saddly comes a time when we can't display any more
They disorganize themselves! I swear it! It's the ONLY explanation.
Maybe they all just try to find their original hat when you arent looking.