Sweater Recycle - Tip in comment section: When knitters cut fabric they first stitch close to where they want to cut with a zigzag stitch to secure that the fabric doesn't unravel. This might make it less stressful when cutting into your sweaters.
How to Scribe for a Perfect Fit Fit woodwork perfectly to even the waviest walls with an inexpensive compass. Read more: http://www.familyhandyman.com/tools/how-to-scribe-for-a-perfect-fit/view-all