Starflowers in Red and Aqua

For June, Sherri asked us to make two starflower blocks following the tutorial found here. She sent along red and aqua fabrics and Kona Snow to make the blocks. In my packet I received two canvas weight prints and two quilting cotton prints. I haven't worked with this heaver weight fabric before though I know a lot of the Japanese Imports that are so popular in blogland and on flickr have a bit more weight to them. I found it to be a bit of a challenge. In her instructions Sherri mentioned that it might be easier not to use the heavier weighted fabrics in the same block so I followed that advise. However I found that the heaver fabric still pulled on the lighter weight quilting cotton a bit and made it hard to get nice flat seams when pressing. Overall I think the blocks turned out well despite the extra bulk in the seams. The middle point of these blocks was a little difficult to maneuver and I'm wondering if any of you who have worked with the heavier weight fabrics have any suggestions for the next time. I'm glad I got this challenge though because it was fun to work with something a little different and try to figure it out.