I agree with patchwork. I long-armed a quilt for a friend. When I got to the bottom the border was a good 1-2 inches longer than it needed to be. Thankfully it went across the entire quilt, so I removed the border and sewed it back on. I told her about it and how to hopefully prevent it from happening again. She was grateful for the suggestion. But then that is not to say that the long-armer did stretch it too much.