KCee I thought the TX90 made for a great hybrid shaft. Just the right heft and high launching.
I am speaking of irons for Steve apples to apples and with his type of swing stats, not the average male player of 20 years ago. It's the aspect of to lose weight and in 2006 steel iron shafts that weighed 90g vs. Dynamic 130g was a big deal. To lose shaft weight the shaft has become thinner, thinner means more rigidity (more rigidity means stiffer tips, stiffer tip shaft profile means golfers with lower clubhead speed and early release means boardy) that's what I meant by translation. Semantics. One golfers great shaft is another's POS. ☺
Nippon in it's way is marketing the Zelos shaft as a replacement for graphite but there is a lot more than meets the eye.