Just to give you another option this is how I like to make mine shirts sewn to each other without the use of sashing. I do use light weight pellon the only thing I would do different is cut the shirts all at sizes divisible by 3. Ie 6.5 x6.5 *or 6.5x9.5 12.5x12.5. It would have made putting the puzzle together easier. . This is pieces and parts of more than 60 shirts.