anyone used those thin metal shims you can push in the back of the plug to retain the shear line?
If you wanted to make a key for a lock you are struggling to pick you can use a blank key or pick to lift the pins from back to front and push the shim in further each time you hit the shear line.
Bit harder to use on locks with serrated pins and spools. Will not work on seperate sidebars although you can retain the pins and then just pick the sidebar wafers