Yeah, you have become hooked. What a great choice of fabric. It worked so well, scattered color and great pattern. The lime green with it is inspired. The black sets off your wonderful kaleidoscopes. Oh I could go on for ages listing all the things you did to make this one knock out of a a quilt.
I love the 60 degree triangles and usually I would say starch your fabric but with stack and whack you can distort your pattern so you can't do that. I use a walking foot and handle as gently as I can.