Hi Chuck,Would you please describe in more detail regarding the sequence you are following and what is happening when you "spiral" on the C6 course?
The fact that you have already cut two Cleo's without problems leads me to think you may be having a hardware related problem, rather than an issue with not understanding the cutting diagram. With two preceding successful stones, by the third one you should be pretty comfortable with this diagram and design...
Did you have any spiraling type problems when you cut either side of the girdle on your third stone? Is the dop tight in the quill? Have you had the problematic stone out of the quill since cutting the crown side of the girdle on the third stone?