Mod idea I am giving away for free because I don't have the time or means to make them. Someone make custom Pinshield logo stickers (just the shield) that can be printed with a game name or abbreviation. Then the sticker can be applied to the shield on the Pinshield, making it custom for that game. It would help when you have a bunch of them off and you want to put them back on the same games that you took them off of (some fit certain games better than others).
It could be a simple white shield shaped sticker with WOZ or AFM in it. Or you could actually do custom backgrounds from that particular game and the acronym in it. Whatever you decide and how artistic you want to get. But this way, you could identify your mats to your game. And when you sell a game, if you want to keep the pinshield and use it elsewhere, its as easy and switching out a sticker.
Whoever makes them would mostly need a way to print out the custom shaped stickers, and then stockpile a bunch of custom art, or fonts, or however you wanted to do them on their computer. And then just print out the stickers as they are ordered.
Anyway, I would be a buyer for 5 of the stickers...