Sure you can drill CF, there's a few extra steps to it. First tape the area to be drilled top & bottom. Then start with a small drill bit slowly working your way up to your final size. The biggest "key" here is let the drill do the work, DON'T apply alot of pressure, let the drill do the work. If you apply pressure you risk damaging/weakening the area around your mark. A small block of wood on the bottom side will help support it while drilling.