ALSO.... if you are thinking of putting this quilt into a Show or competition, please check their requirements/suggestions. In the years that machine quilting was first becoming "popular" there was alot of discussion about what was acceptable etc. What I prefer to do, is run the whole WOF down the center & build out blocks or rows until the backing is large enough. I have just purchased a huge backing for a large quilt top.... hopefully I won't be having to "add" to it.