I've made a few t shirt quilts using the method described here:
https://www.google.com/url?sa=t&sour...qq40pR1ipPO6N-
I do not use any stabilizer and sew the t-shirts together just like when sewing cotton Woven fabric. They really go together easily and i quilt on my longarm. I took a class at the quilt show in Houston a few years back where it was declared you must use stabilizer. I did not like the stiffness of the t shirt squares. So I searched and found the mentioned website, got her book and made these tshirt quilts.
p.s.
I use batting and cotton wide backing