Quote Originally Posted by jugglindan View Post
I have to ask: what is the "knot in the bridge wire trick"?
Just drilling a hole just wide enough and deep enough where the bridge wire hole comes out that's big enough to hold a small knot on the bridge wire itself, so that the wire can't get pulled back too far when you're soldering the other end to the back of a pot and/or getting rid of any excess slack. Also works for trapeze tailpieces if you drill a small hole for them under the end plate and then a slightly wider deeper one for a knot.

You certainly don't need to do it, but it does make fitting the grounding wire a bit more foolproof.