Separating with Hand Combs
The first method and the one I preferred was to use hand combs. This does not mean it worked better than the other method, just that I could watch TV while I combed ;) I simply loaded and combed the fiber as I would for any other wool. I would like to note here that I experimented and loaded the combs with the locks going in the same direction as well as loading the combs with the fiber going in whatever direction and found the results to be the same.
After your fiber is combed to your satisfaction, hold the comb securely between your knees and gather up the tips or longest pieces in to "beard" and gently pull off in tufts until the longest fibers have been removed.
As you can see, the shorter fibers will be left behind on the comb. As with the long fibers, simply pull off in tufts. I found I was more successful in keeping the two coats separated by pulling the fiber off into tufts on the hand combs versus when I tried to diz it off.
Separating with a Comb and Hackle Set
To separate the 2 coats with a comb and hackle I simply loaded the hackle and combed the fiber as normal.
To diz off the longer fibers I gathered a bit of the longest fiber in the lower right hand corner and threaded it through my diz.
I dizzed just like I would for any other fiber BUT I kept the diz much farther away from the hackle in order to only grab the longest fibers leaving the shorter fibers in place.
Once the longest of the fibers had been dizzed off I broke the roving separating it from the fibers left on the hackle. This gave me a very airy roving with a long staple length
For the shorter fibers left on the hackle I again gathered up a small amount from the right hand corner and threaded it through my diz.
Diz across the hackle as you would for any other fiber. I did find I had to get a bit closer to the tines to get the most fiber off....I was using the 4 Pitch Hackle which was "swallowing" some of the length of the shorter 3" fiber but it also made it easier for me to differentiate the long from the short.
Using the comb and hackle method will produce "top" that can be wound into birds nests versus the hand comb method where one gets "tufts"
I found both methods worked well and I could see the difference in the two coats once separated in both staple length and softness. As bonus I have a nice fleece to play with and spin up for myself:)