Well..I think you'll have an idea of what to do next after all the advice, so I won't add too much. You may have to increase the size of your backing fabric to achieve a good end result, it's hard to see from the pics, if this is the case. Anyway...I use a spare QS bed to baste....easier than the floor or a table for me. I also find a big marble slid underneath the backing fabric stops you basting the mattress to the quilt and helps keep all the layers together neatly whilst you pin or stitch. Sing out if you have any more questions....and stick with it...it's going to be a really pretty quilt.