The Aviatrix Medallion can be tricky! Here are a few pattern add-on documents that might help:
Templates for making larger versions of the center block can be found here.
The Aviatrix Medallion quilt shown in the pattern was made using my Designer Palette of Kona Cotton Solids, and those colors are listed in the pattern, along with a chart that can be used as a guide for fabric placement. The block accents are Kona White and the background is Essex Linen Blend in Yarn-Dyed Steel. Some other colorway ideas for using Kona solids and Essex linen blend can be found here.
I've also written a block-of-the-month program that is available free to my wholesale customers. Please contact me for more information.