VERY homemade. It's an upsidedown doorstop cut down to the right angle, and the Contour helmet mount. I cut a couple slots in the visor, and use the velcro straps to snug it down. More information than you could ever want about helmetcam tips & tricks here at Motojournalism, courtesy of Anthony (thanks so much for the scarves!) the inmate formerly known as Antontrax.