I see much complaining how Chest Shops don't work with Lockette.

So, to help out here is how-
http://gyazo.com/e85906fef5b63460c58a158cefa85d81

Simply place a sign ONTOP of the chest or on an block that is in an 1-block radius, but NOT on the chest!

This would allow for you to protect your loot & to have a shop


Hope I helped!