How the he** do you tighten the round face nut that holds the switch in place on a Les Paul? This is a deep shouldered nut and not the flat one that comes with the Switchcraft 3-way toggle. I've read and seen in vids that you shouldn't use pliers because it can mar up the finish on the nut and around it on the guitar itself. So how do you tighten it without buying the $20 StewMac tool? Would one of these knob remover/spanner wrench things work? Thanks.