Tis better to have a hole that flows enough fuel vs a hole that is to small when you KNOW it's to small. Piece of cake buying the right jet (or several) for a Holley. Try THAT for a vacuum actuated Klien motorcycle carb! The range is severly limited and I'm well outside the 'box' on this project (this thing should rip when I get the carb dialed in).
Maybe I'll try to find some jeweler bit's (do they make those?) and have a go at it, I got lots of jets to play with (all to small).