Fujikura SIX DRIVER SHAFTS
The Fujikura SIX is an update and new release of a past Fujikura design. I did not know the original shaft so I cannot comment on the similarity. This short video will give you the history of the design.
As mentioned in the video, it is a classic design. A slightly soft mid in relation to tip and butt. As you noticed in the video, the term soft causes most in the shaft business to flinch. Perhaps some day I will learn to say stiff tip stiff butt rather than soft mid. I start most fittings with a soft mid shaft, it fits most players so it is no wonder this shaft was once popular on tour.