Of course, I'm not done talking about spinning colors long.
I was reminded by Marina in one of my class at WEBS, the easiest way to spin colors long. It's especially good if you're finding spinning across fluffed out fiber tricky.
Tear it up. Break the fiber apart by color.
Fluff those colors, then split it vertically into manageable pieces and spin one color at a time.
A decision you'll have to make is what to do about the transitions, the colors that overlap. The little fluffs of the next colors on the ends. Do you want to keep them or remove them?
I almost always pull off the transitional colors, and spin the colors as clearly as I can.
The transitional colors that I've pulled off get put into my stash for making batts.