Installing the Flatter
In the event that the Flatter is slightly wider than your guitar neck, use the supplied foam stickers. Apply the stickers along one side of the flatter, and use this side first when installing. Then proceed as before.
After installing the Flatter, apply pressure to make sure it sits properly. Tighten the strings, tune your guitar and you are good to go.
To uninstall the flatter just loosen your strings and pull it gently off the guitar neck from either side.