I just got a hold of Keith D Tuners and looking to replace the white ones with black. Can't find anyone who sells splined holes in black buttons but Greg Boyd said he'd drill them in if I can send him a couple pre-drilled buttons. So my questions are:
1) Does anyone know of a place that sells pre-drilled buttons? 2) What are the different types of material used for buttons? I'm familiar with ebony and plastic, but are there other materials I should be looking for as well?