Well, went to use my Twinmax for only the second time for my 24,000 mile service, and the sensitivity button has no effect. MFer. Shoulda known when the label clearly states "Made in France". I don't suppose there's anyone within a couple of hundred miles of Boston with a Harmonizer who'd be willing to hook it to my bike for the few minutes I need to synch things up? I'm thinking I'll just a ride in, hook it up, I'll bring m own 10mm wrenches, and a six pack of your favorite beer.