Things to keep in mind for why I said what I said.
For starters the spring base that the Midland Antennas(specifically the Highland 3dB for this discussion) is pretty heavy duty compared others like the 6dB antenna Midland offers(the super skinny whip). To specify that spring is more than capable of holding the antenna in a folded position just fine. If it wasn't, it would have problems holding the antenna upright while driving down the HWY.
Next is to understand that particular antenna I'm looking at. Both the Highland and Canyon Edge that I mentioned above are still 3dB antenna's like the Ghost antenna. Of the 3 one actually requires a ground plane(something I wasn't aware of at the time) vs the other two that don't require a Ground Plane(though it would not hurt to have one). In reality the antenna wasn't stacked to get the signal. If it was stacked, it would be a different signal with frequency or gain.
i will also add that the Highland antenna has a set screw to lock down the antenna down to the spring base. This will make it nice as the set screw will not let the antenna just vibrate and rotate off. It will also help keep others hands off if they don't have the tools.
Last but not least and I this is more of a poke to the comments of wanting to talk to the Moon. I am choosing a 3dB antenna due to the use I have. I understand that the beam pattern is more of a ball pattern vs a stretched oval that a higher dB antenna has. With a quality antenna in combination of the 50 Watt Radio I have, I should still be able to get an excellent range in general. I also understand that the 3dB will be great for mountain type terrain that I usually travel on. If I was traveling more on open desert type terrain, then a 6dB or higher would be better, but I'm not on that type of terrain regularly. Let's also keep in mind that if my goal was to talk to the other side of the world, I would have a base station HAM radio with more power than anyone would ever need.