I bought the SM for the wife a couple of months ago and it has been performing flawlessly... until today. When she got home, she took it out of her purse and it just started firing on its own. So I unscrewed the hex screw and pushed the pin down a little but that just made the device not work at all. So I pushed the pin back in a little bit and the device started firing on its own again. I even tried adjusting the spring a little but only got the same result. Anyone else experience this? Could this be a headcap issue? I called Jay at about 730 (pst) but got his voicemail so I just left a message. Until I hear from him, I thought I would see if anyone here could offer any other advice.