It seems we've mastered every part of the car-building process. When our engines wore out, we bought a book and rebuilt them. When the body shop gave us our first estimate, we learned how to paint. We ...

Question: Can you tell me why, when I come to the end of a seam, the threads get bunched up on the bottom layer? It doesn't always happen, but when it does, I find it so annoying. _ Mrs. K.N., Prairie ...