I have done many tshirt quilts with minky on the back. As a matter of fact, I'll have another one finished by the end of the week! I send mine to a long armer and she's never had any issues to tell me about. My tshirts are stabilized but not my sashing. I've used both flannel and cotton for sashing. Don't be discouraged! Once you do one, usually somebody else falls in love with it and asks for one as well!