If you drilled six holes, they'd be tiny. The wires and the connectors to the block are all about as small as can be; they're actually kind of hard to manipulate they're so small. Done carefully, I think it would be almost invisible. If I were doing it, I'd probably drill two or three slightly bigger holes and rout two/three wires through each, I still think it'd be invisible...(quick look at my drill bits)...I'd say 1/8 holes would be plenty large for 2 or 3 of those wires, 7/64 would almost certainly do it. If you've got multiple good hard drill bits and a vise of some kind, you could try 1/16 and if that didn't work, go a size up. Definitely between 1/16 and 1/8. Again, I haven't done this, but that would be my plan. Finally, just having the wires go right into the pickguard is what graphtech recommends, it's what I did, and it's hard to notice them until you get close, I guess if your bridge was black it would be more noticeable. You could do this first, then do the drilling later if the look bugs you. Again, I did this on a POS guitar body so you may care a lot more about looks if you're doing it to your dream gear. If my football team is losing on Saturday I may drill through my bridge just to cheer me up, I'll post pics if I do.
