Have been using the Helmet mount on the Contour with success, but had some RAM bits in the shed from other projects.....so mounted near the (L) mirror with a S/Steel backing plate to support the ST1300 tupperware with S/S hardware, used the shortest RAM arm so not to exacerbate any vibration.
Seams a winner.....testing will tell, can turn camera to capture forward, rear or rider....easy to reach with the left hand.
Cheers