I think it is decidedly NOT possible.
I gave it lots and lots of thought, looked at the videos, but I came up with the ends never being where you needed them. I spent an obscene amount of time looking yesterday for patterns, and did finally find one at paradisefibers that uses short rows to get the pinwheel effect. I thought about sending away for it, but I couldn't find anything else I wanted to order from them right now (
I couldn't believe it, but I couldn't.) And I just don't feel like waiting for it.
So, I will be doing the standard bullseye rainbow - which will be okay, but not stellar.
Thanks so much everyone for your votes of enthusiasm!! I appreciate it! You almost had me convinced I could do it!