that's great Tom, congrats
I think I got it for $35 on Amazon.
one downside while recording videos is (assuming you bought a shorter arm...like me!)...at high speed the visor vibrates pretty bad, which in-turn creates a rippling motion and kinda ruins the video... (this is when you point the cam towards the road ahead)
one way to overcome this is to buy a longer arm...(which connects the base plate and the cradle)
but while recording the speedometer, shorter arm would do just fine...