coin-star --
I couldn't agree more. The Minelab shaft is "ok," and it's good (in my opinion) to use as A.) a backup shaft, and B.) a travel shaft -- as it breaks down smaller (as a three-piece) than a two-piece carbon-fiber shaft will, of course.
However, my main reason for designing an Equinox two-piece carbon-fiber shaft was exactly what you said...it's a much stiffer, more solid, more stable shaft -- so NO WOBBLE. AND -- as you said -- eliminating the button holes in favor of a "proper" cam lock (a strong clamping-type cam lock, more akin to the CTX 3030 cam lock, in my case) means "fine" adjustment of the lower rod length is possible. To me, that "universal" adjustment length capability is a great benefit, as opposed to being limited to the fixed adjustment lengths on the stock shaft, as forced by the button hole locations.
Some don't see the need to spring for a replacement carbon-fiber shaft, and I get that; it's a non-trivial amount of money to invest into the machine. BUT -- the machine is SUCH a great performer, that it almost DESERVES a higher-end shaft. To me, adding a high-quality carbon-fiber shaft changes the Equinox from a "great machine with a sub-par shaft" to simply "a great machine."
Steve