No need to shell out $ $ $ $ for the "enlargement/reduction" CD. In Carol Doak's Easy Machine Paper Piecing, she tells you how to do it. On page 5, Doak introduces you the tool: Proportional Scale. I've used this countless times on other projects. "You align the size of the original on the inner wheel with the desired size of the reduction of enlargement on the outer wheel, and like magic, the percentage of reduction or enlargement appears in the window." Direct quote instructions from the book. Simple to use. I purchased mine at Office Max years ago for $2.95 (I store it in the original package that still has the price on it) - shouldn't be too much more than that today (hopefully) . . . .GP