I'm building a new router table (Norm's design) and ready to drill the shelves for the router bit storage. I have a 9/32" drill bit for the 1/4" shanks, but I'm having trouble finding a 17/32" for the 1/2" shank router bits. Northern Tool has them as part of a set for $45 but I figure there's got to be a cheaper way to drill a few holes. Anyone out there have any suggestions?