I am thinking of having a couple tuna rods built with them and maybe their adjustable butt if I can get one.
They are pricey but they appear to be much more rugged and have a really nice bearing compared to the aftcos. Machined out of a solid block of titanium, no joints or welds. I have seen them a couple times on big time sportfish rigs but it is not something I see very often. I have never seen the adjust-butt but would like to try it out.