Hi Graham, did you go for the carriers as well, I know it adds to the cost (I can readily spent any one's money) all you need do is scroll out the whole jaws and swop back in numeral order the other set, saves on fiddling with allen keys & small screws, especially if you change jaws regularly, unlike the most of us, there are those who have numerous chucks setup with different jaws, very handy, I run to two chucks, but they fit each of the lathes and odd have the same C jaws ..
.. well the newer set has the 2 sets of step jaws which fit the older chuck.
In making the steady post what's, how and wherefore with the parts, it will be of interest, I'm sure for others.
Cheers David