I love center medallion quilts. This one uses 9 different Inklingo Collections [http://inklingo.com] in 10 borders plus the center block — all that adds up to 20. The center block is the Inklingo 20″ Feathered Star Collection.
The 6 & 12″ Sunflower Collections and the Alabama Beauty are 2 of my favorites. I also used the HST, Free Collection, Fancy Dresden, Clamshell Edges, and Patchwork of the Crosses Collections.