I was looking at pictures of the 913Fs/Fds on GolfWrx and it looks like they have a two-piece ferrule. Is that right?
the club head shaft design is very simular to the 910 line. im not sure exactly what your asking. the position of where the shaft enters the head is diffrent thus the shafts are no longer enter changeable but aside from that the technology is still pretty much the same.
I had a closer look at the picture and I can see now that for the 913Fs, and presumably for the 913Hs, the portion of the SureFit adaptor with the numbered "cogs" is much longer than that of the 910 adaptor and has a tapered section that is topped with a short ferrule.