From bowriders to express cruisers, boats have dozens, possibly scores, of holes. There are holes for water pickups, drains and transducers, and above the waterline for bilge outlets, air-conditioners and exhaust. And the deck? Fresh from the cut-and-grind booth it looks like Swiss cheese. There are holes for cleats, tow eyes, grab handles, speakers, lights and more. And that's on a brand-new boat. Why should you fear drilling one or two more?