I have been so afraid to make anything that wasn't a square or rectangle. Now I ask myself . . . WHY?
This was a super easy pattern (from Patterfish Reynolds 82093) and I learned something about myself as a knitter. I knit super tight. Pattern called for 660 yards of Lopi Bulky, (Gauge 10 st.= 4 in. on size 13) using size 11 needles. In order to get the proper gauge I would had to use at least size 13 needles, and then it would have been too loose of a knit.
Instead . . . I used Rowan "Big Wool" (Gauge 8 st.= 4 in. on size 17 or 19) on size 11. I used almost almost all 10 skeins (870 yds.) I had purchased.
At any rate . . . I want to encourage others, who are also afraid, to dive in and go for it! But buy extra yarn, LOL.