You will need a piezo buzzer
Female 1/4 jacks
Wire
Mouse Pad
Mount Base (i used wood craft tiles)
Glue
Screws
Anything else you would like to help MOD the thing.
Step 2. - Solder the piezo element & 1/4 jack
Step 3. Drill holes in the base
Step 4. Paint/Stain Base
Step 5. Cut mouse pad
Step 6. Glue Rubber to Base & apply pressure if needed
Step 7. Attach piezo to the base
Step 8. Tape down the wire securely
Step 9. Screw base pieces together.
Step 8. Mount em, play & break em =)
You can see mine with my home practice rig. They trigger just as well.