I used freezer paper to stick the white in place for the beginning and the stripes for cutting. It made it so much easier to keep the shape that way. I have to say it was also easy to remove the paper at the end. The seam allowance was a bit tricky as the freezer paper is a little stiffer than normal paper but with the tweezers and a little finger press it was removed nicely.
I love this spider web block and one day I hope to get my own spider web quilt but first I have to finish the templates I have on my FAL list.