[Ken Leung]

The way the spring work is the more you turn on the dial toward "drill", the harder it press on the spring, and the harder the spring press onto the little metal balls under it.

So, one good way to lock the clutch in gear is to take the spring out, and replace with a solid ring the length of spring when compressed the most. Then the metal balls will be flush with the holes, and grab onto the ring gear with little notch completely and prevent it from slipping.

The other way is to take away the dial completely, and the metal balls as well, and tap the hole, and put set screws in instead.