AeroPod, PowerPod and Newton

I recently received the Garmin combo mount for my Aeropod. I have 25.4mm handlebars so I installed it using an aluminum handlebar shim. No matter how tight I tighten the screw, when I go on a bumpy road the mount shifts downward. I have tried roughening it up some but it looks horrible. Can someone ...

I currently do not have a power meter. I am thinking to get the Aeropod + so that if I ever get a power meter then I will not have to upgrade. Will the AeroPod+ without a power meter do everything that the Powerpod V3 + options such as Powerstroke, GPS, and Pitot tube will do or will I run into some...