Wow, Siodach, what a way to come out of lurking! I love what you are doing and that you are reducing the overall scale at the same time is amazing. Good for you for figuring out your mathematical challenges and ways to use the pieces. I'm going to figure out what I'm doing with my whole extra step worth of pieces but that won't be any time soon.
I really like the strength of your sashing -- I'm going back into my boxes to see still yet other options... I think the aqua I currently have picked out is most likely low-poly but still a blend. I did a burn test and part of me says -- perfect color, enough yardage and close enough fiber content, and the other part says no, too shiny and won't wear/weather the same.