Rebecca -
I've only done four in flannel, three raggy seam quilts and one regular pieced. I would advize and walking foot and 80 per cent poly batting due to weight of flannel.
Sew around outer sides of quilt twice as very heavy when wet. Poly bat will dry faster than cotton bat or flannel lining. Umm, I wouldn't use small pattern pieces due to bulk
but think about 12" finished blocks. Everyone I have done a raggy quilt for loves them. I have four "orders" from
grands (12 to 16) that want bigger raggy flannel quilts.
There a some good books, but even half square triangles give a lot of leeway for design. The next flannel quilt I do will be a copy of one in white and burgandy in two different sizes of diamonds. Perfect for Xmas, it is a raggy quilt as well but fab looking.
I think it is more about color and design cuz no matter what you do - good flannel will really last and always be
a snuggle magnet.
PS Seems as tho I can't sew a straight X in blocks so I use a ruler and a chaco chock marker so they turn out perfect.
Or I use a heart shaped plastic template and marker.
Let us know what you decide to make.....
It will be fun and loved for ages and ages....
Cindy