First off, I love what you have done already! I have this pattern, but haven't done anything with it yet...you give me great inspiration!! I recently made an applique quilt with all different vehicles, themed for a small boy...I ended up using matching thread to each different color of each piece of the different vehicles...I know a lot of work, but I tried using just black, just grey, and just white, ended up liking matching each the best...as far as the sashing, I love greens, so that would be my choice...
Thanks for sharing, can't wait to see it all finished, however you decide to do it, I know it will be awesome!!
Kif