Wow, the adding machine paper idea is fabulous. I love pieced borders, and the 3" width is useful for sub-cutting into patches for piecing. I'm adding this to my inspiration file.
I follow Bonnie Hunter's blog, too. Earlier this year, she posted pictures of her updated scrap savers system, which is now sorted by size and color to help tame her huge collection of scraps. Within each bin of a certain width, she sub-sorts, stacks, and rolls her strips into baggies by colors. Some of her newer quilts are controlled color schemes, so the new method is faster and cuts down on fraying when she is looking for certain colors.