I am using the complete pole series 2 a lot (= several times a day, five days a week) these days, while mounted to a tripod.
Which is quite a nice tool but also has a big annoyance.
The lowest section with the biggest diameter is prone to blocking.
Most likely due to wrong dimensions/tolerances of the two plastic "gliders" at the bottom.
The situations where I use the pole are sometimes quite demanding and definitely not of the sort where one wants those things to happen. I now will try to find a way to "readjust" these parts but you might address this issue in your further development. Unless the one I'm using came with a failure from the factory, I'm under the impression that the forces working at the gliders and the guidance in the lower section are above what they were designed for.