Recently purchased a Dual Router/Plasma table and I'm confused.. What's the best way to use drill bits for drill holes using a CNC router? I have a Porter Cable 3.25hp Router with 1/4, 3/8 and 1/2" collets. Do I need to buy special drills with these standard shank sizes or buy a drill chuck to use regular drills? I thought this would be a really easy question but since I can't find the answer it must just be a stupid one!