Hello, I'm about to shave the neck of my 2009 LP Standard ebony. It has '59 Gibson style thick one. Of course by luthier. He prefer to change profile from thick U to soft V, just shave off the shoulders but I like it to be thinner about 2mm. If anyone know how deep from fretboard is bottom of truss rod channel, I will appreciate any info. Maybe someone has its fretboard off the neck and saw it. I suppose my model has bi-flex truss rod and it has flat channel just under the fretboard, what makes about 1cm distance from bottom of the channel to back of the neck, all along the neck, not like old style bowed truss rods. I guess if there is no skunk stripe under a poly finish there should be a bi-flex truss rod. On the other side, Epiphone probably didn't change neck wood but they did change neck profile recently to very slim taper D, so I guess it won't hurt my neck either to be just 2mm thinner, but still a lot thicker than modern necks.