Oh that's so neat! I'm working on a queen size bed quit using a 2.5 inch tumbler. :) It's a lot of fun, I've got over 200 blocks all of different fabrics cut and sewn together. I need a ton more, but I'm working on it! I don't plan on adding a border to it, but after quilting just bind with the angles - that looks awesome (IMHO).
Yours is so pretty, so light and airy!