Today, I found out about soft stepping and hard stepping.
basically it allows one to tweak the flex for the shaft such that you get a stiffer (hard stepped) or more flexible (soft stepped shaft).
Basically for soft stepping you put a longer iron shaft into a shorter iron shaft and butt trim it. 3 iron shaft into your 4 iron, single step; 3 iron into your 5 iron, double step. Hard stepping would be vice versa 5iron shaft into your 4 iron.
But a hard stepped regular is still softer than a soft stepped stiff.
http://www.youtube.com/watch?v=cmVzmzaXpEE
But there are many other ways to play with the flex, ie tip trimming and all. But that would be another topic all together.
Just soft stepped a project x 6.0. It ends up stiffer then a dynamic gold s and project x 5.5 but softer then dynamic gold X and project 6.0.
Just glad with golf there are such options to lend fun to your game.