I'm pretty psyched at how easy this was. It's just a bit from an old wiper blade, a clothespin, and some foil tape: No drilling, no screws, just making a bend with a pliers and soldering in three wires. You adjust sensitivity by layering the foil tape. That being said, I haven't really finished it. I need to fix it to a base, attach paddles (maybe guitar picks) and probably add a piece of tape so the wiper blade says in place. Still, pretty cool for a few minutes of bumbling, and I could get it assembled with a K2CAJ level of skill and patience.