[joshcryer]

I remember being annoyed by the end of that video with the backplate. swighton had already thought of that and machined for a backplate but it was just left out so the LPL could crack into it.

In any case, this guys design I think is a significant improvement over swighton's. swighton made it so that the key triggered the locking mechanism as you pressed it in, this guy made it so that you had to turn the key to test the locking mechanism, as well as adding a multipin stack.