Terry said not to use the dunlops due to the fact that they stick out from the body, so when there is force on the strap it has a lever effet on the screw inside the body. and to use schallers. (I am sure that was what he said, may have a dodgy memory... :roll: )
With the Schallers I think the screws are a bit smaller than the hole for a les paul, so I just filled it with matchsticks and put it in.
Also on my Gibson, he did the matchstick thing, and glued them in... its SOLID!