Well, here it is tomorrow and I am thinking about it, thanks to your encouraging posts. Generally, I don't have concerns about dividing plants but these plants have such long, brittle root/arms extending out for a foot or more just below the surface that I am afraid I will break them off. I am glad to hear that you have had success doing it, gemini-sage, and I think the keys to success will be starting way out from the crown and using the wiggle-wiggle-wiggle method, as critterologist suggests. Also, I need to make sure their new holes (or should I say shallow craters?) are already prepared for them before digging them up.
I am married to a double Gemini. I am sure he thinks he is a sage and he often sounds like he is a sage but he can really confuse me. He will insist something is such and such or that he doesn't like this or that and just when I think I know his likes and dislikes he will totally change his mind and say the opposite. He is a very nice person and I love him dearly but, boring, consistent Taurus that I am, I can't keep up with his changeable flibbertigibbetness!