When being fit into KBS, how does a player achieve a mid-flex or achieve a more precise fit?
The KBS Tour shafts are manufactured in both parallel tip and taper tip to cover irons 1-PW. The parallel tip shafts are easily customized by various trim increments on the butt or tip end of the shaft. KBS has published trim charts for various frequencies under the products tab. The taper tip KBS Tour shafts have some limitations; however, fitters can soft-step up to 2x to achieve a mid-flex. (For example: use a 3-iron shaft for the 4-iron, the 4-iron shaft for the 5-iron, etc.) Hard-stepping to increase stiffness (or frequency) is a little more complicated and should be discussed with a custom fitter.
