(I ordered a panel and enough for a border to back another purple/aqua/black project I have going) and I think your sashing idea is perfect. I think 1.5" finished would look great. One suggestion if you don't mind my saying - I love your layout except I would change one of the first blocks in rows 2 and 3, as those two squares are almost the same. I would just move one somewhere and trade it out. Otherwise, it's gorgeous and I hope you share pics when it's finished!
Last edited by QuiltnNan; 08-22-2019 at 07:09 AM.
Reason: shouting/all caps