I have both the 9 degree ruler and the 10 degree ruler with the extension. you should be able to use the 9 degree ruler for some of these projects too. Huggies, Fay...Oh I figured out why my mini spiral center volcanoed on me, it's because I didn't cut 9 little spiral , I only cut 8 and got the dreded volcano effect so tomorrow I will cut one out again and maybe applique' it over the black center and that will really make it show off. Wheeeeeeeeeeeeeeeeeeeee Great idea. Well gotta take a shower and go to bed. Good night