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Chapter 4. Maple Mike: > Hey! Let's Build the Trigger! - Pg. 128

Maple Mike Figure 04.22: The "only looks like a pain in the ass to fabricate" trigger in real life · Two 2" 6-32 brass machine screws · 1 1 / 2 " washer with a 1 / 4 " hole. Oddly, I couldn't find one in house for love or money, so was forced to drill out the hole in a "close-enough" diametered washer of European (read "metric") origin. Start by drilling a 7 / 64 " hole through the brass rod 1 / 4 " from one end. Tap 8-32 threads into it, then carefully cut a slot 3 32 " x just about 5 8 " down the length, perpendicular to the / / threaded hole. Clean up the slot with needle files; the slot needs to be just wide enough to accomodate the cam lever, with enough clearance to allow it to rotate smoothly around the axle point. Cut a screwdriver slot into one end of a 1 / 4 " length of 6-32 machine screw and mount the cam lever to check the action, dressing the metal where needed to ensure a smooth action. The handle of the cam lever is a short length of 6-32 machine screw with an acorn nut on each end. Use a drop of LocTite to keep it from unscrewing. [Figure 04.25] The brass ferrule is one of those fortuitous happenstance discoveries that occurs while foraging for parts. It's a repur- posed piece of a dollar-store RCA­RCA cable. (Gold-Plated! Audiophile! Multimedia Interconnect! 2M/6 Feet! Stereo! $1.00! That's less than 17 cents per exclamation point, which is a damned solid deal, even if the imperial to metric conver- sion is a bit dodgy.) Overall, it's 1 / 2 " OD, with an ID a bit more than 3 / 8 "; the end where the cable exits is capped, with a 1 / 4 " exit hole. File that hole a bit larger to let the trigger pin move freely, then shape a shallow groove into the constricted end wide enough to slot the cam lever. The floor of this groove must be smooth and flat to let the cam lever slide easily over the surface. [Figure 04.26] Figure 04.21: The trigger: the graceful functionality of the cam in action to achieve Cam Zen, and the only real way to do that is to wade in and start making 'em. [Figure 04.23, Figure 04.24] Component-wise, here's a full list of what you'll need: · 4" of 1 / 4 " OD brass rod · 4" x 2" 16-gauge brass plate · One screw-on brass ferrule from an RCA plug · 1 1 / 2 " compression spring with ID > 1 / 4 ", OD< 3 / 8 " · Four 6-32 acorn nuts 117