I have a Gitzo 5521 monopod which I wanted because it folds to 16". It works just fine, but it's heavy to carry in the field. I've read good B&H reviews of the Sirui P-326 which collapses even shorter by an inch, and weighs almost a pound less.
It's thinner but has 8x carbon fiber tubes. I'm not sure that makes it as stable as the Gitzo 6x at a greater diameter, but it caught my eye.
All the B&H reviews were from new buyers, even one that said the head came loose and had to be glued back on. That was a 4 star; the other 87 were 5 stars.
I'm wondering what's the long term status on this monopod from those who have used it for a while. Stability and build quality to use a 500mm or 600mm prime lens? Any others where the head has come loose?

