I have a book by Anita Grossman Solomon called "Rotary Cutting Revolution". In it she has a block called No-waste windmill block. She shows how to cut a 7 1/2 inch block into 4 "blades" of the windmill. You then lay them out into interlocking windmills and then sew square blocks that, when sewn together, look just like the quilts made using the twister template. I takes a little concentration to keep all the pieces in the right order, but the only waste is from squaring the blocks. Right now I am halfway through squaring the blocks -- can't wait to sew them together!! You can see the blocks laid out below.
There are a lot of interesting blocks in this book!! Worth the purchase. Ann