I fitted a long switchcraft toggle in my Epi LP. The length of the switch caused no problem and my guitar had the correct size hole (1/2" I think) so no reaming was required. What you do need though, is the deep nut due to the Epiphone being thicker in the area around the switch. I only did mine finger-tight and I have to have the toggle switch tip unscrewed slightly, as if I screw it right down it hits the nut and pings back into the middle position.
Deep nut
Picture of toggle on my guitar. My brother has also fitted the same toggle on his Epi LP, but he tightened the nut more, so the tip could be screwed further down. Click on the thumbnail for a bigger pic
