I do a good deal of hand quilting. Don't be afraid to switch plans and try a different thread. I know it sounds like a lot of work but make a sample piece of the same fabrics and bat, it doesn't need to be more than 4x4" and do some practice stitching this will help you to determine witch thread works best. I alway use wax on my thread. Another thing that is a "live and learn" thing is the strength of your thread to withstand wear. Not all quilt thread wears well. Some fall apart in a year or so. I have had several quilts sent back to "mom" to fix. By the time I get them back it is usually a major fix. This is a great forum to ask about how well specific threads wear. FYI one that does not wear well is (at least for me) is American Quilt Thread. It is easy to stitch with but is not as durable in the long run for a bed quilt. Very good for a Show quilt that is not getting used on a daily basis.