Hummingbird Shooter

Step 7 Tep the Piston Mounting Plate and drill corner mounting holes

Although the piston assembly's threads are tapered, I found a 6-32 threading tap worked fine in the sheet metal. This may be different for other pistons, I don't know. Also, you may not need to tap the hole, the tapered threads may be "self-tapping" enough to hold themselves in place. If your camera needs more force to press the shutter buttons, however, the piston may rip loose from the threads if they're not tapped. If this happens, you can buy cheap imported taps very inexpensively, and they'll be fine for light projects like this.

Select a drill bit that's a little large in diameter than the mounting screws you'll be using. ( I used # 4 or #6 screws, 1/4 inch long). Using pliers or a vice to hold the plate, drill the corner mounting holes.

Carefully file and sand the edges of the metal plate when finished to avoid sharp edges or burrs that can cut or scratch you.