Paul kgyy wrote:
c. Suction Cup mount
This seems the best option in many ways, except that the
suction cups fall off occasionally, which is a safety hazard.

Do you have the long- or short-arm between the 396 and the suction cup?
If you have the long one, it may have too great a moment for the suction
cup to hold. I have the short one, and have only had it come off after
sitting in the sun on the ground for a couple of hours.