I wasn't sure I liked tossing in the pinwheel blocks at first, but after staring at them on my design wall for a few weeks they kind of just blended right in with the other crumbs. You have me beat on your progress of 98 blocks, I am at a stand still right now with 80 blocks done. My crumb pieces were tossed into one of those big plastic tubs, one day a few months ago I opened up the lid and scooped up an armful and dropped them right down next to my machine and that's how they were born. Did you find that they go together pretty quickly? I thought they did, just grab and sew....no rules or directions. Mine are also 6.5 inches. Looking forward to seeing some pictures of your progress.