When you guys make a t-shirt quilt do you put interfacing or a stabilizer of some type on the back of it? I'm making 3 t-shirt quilt with my mom of my brothers shirts, one for my parents, 1 for me and 1 for my sister. the plan is to have all 3 done for before the anniversary of his death. but I wasn't sure what you would use since shirts are a little stretchy. Any advice that you have would be really helpful. Thanks!