It'e been quite a while since I've been around here, but I thought I would share the result of my first successful attempt at this rose (or any CP for that matter). It's from a piece of standard US copy paper (8.5" x 8.5").
I highly reccomend perrosaurio's guide to anyone struggling with this rose. I also discovered something rather interesting about this rose, during the initial creasing of the CP (before collapsing), if the 1/11th divisions aren't 100% perfect, the rose will still turn out looking pretty decent. My 11ths weren't that good, but I think it came out pretty good for my first attempt.