I am in the process of making a quilt called "Fairy Steps", from Pam and Nicky Lintott's book , "Two from One Jelly Roll Quilts. I am having trouble putting the units together so the angled sides are even. I have ripped out at least three times :-( . I really don't want this to become another UFO. I have included some pictures of what I am trying to put together. I have tried placing right sides together so the sides are straight, marked with a chalk line, but when I sew the pieces are not straight. HELP! I have included pictures.
Quilt Blocks sections
Picture from pattern book