Bruce King in his amazing workshop.
The snare bed is a groove on the "snare side" drum rim, which allows the wires to be pressed up against the drum. The concept is explained best at this post on drummagazine.com. I don't really have any experience with this kind of thing, so I decided to have it cut out by a professional.
Bruce King is this really awesome, friendly, knowledgeable dude who's been a drum maker for years. Everyone I ask in Auckland about this project says "ask Bruce". He was genuinely interested in my ideas, and had some great advice. He asked about my playing style and how I wanted the drum to sound, and had the bed cut accordlingly. Awesome!
The finished snare bed. Can you see it?