I am ready to put together my 12 donation quilts - I am going to try using spray basting, outside tomorrow - weather is supposed to be warm. I was going to using thin batting, but somewhere I think I read online that I can use flannel. Can anyone give me the pros and cons for either batting? The quilts will be used in New Hampshire so being too warm isn't an issue, but will flannel as a batting be too heavy? I am going to machine tie the quilts together using my double star on the Janome 10000. Any hints to make this job less "assembly line". I have to finish all 12 quilts by May 12.