I am planning on purchasing an iPad for use around the farm and to mount in a tractor or combine. I am looking at using a OtterBox case with Tab-tite Ram Mount for sure, and I would like to mount it to the side window so it is easy to move from vehicle to vehicle. Ram makes a single heavy use suction cup mount and a triple suction cup mount. Do you think that the single would be sufficient for the roughness and vibration of a cab, or would the triple suction be the way to go? I am not only looking for it to stay on the window, but for it to be stable and not shaking. Thoughts?