Instead of trying to attach a stiff piece of plastic to a T-shirt with great difficulty, you may stencil print your Ultimaker T-Shirt with this 3D printed Ultimaker T-shirt stencil printer. Yay! Glue all the pieces down on your T-shirt with water soluble glue such as Elmer's (TM) glue. Let glue dry. Put T-shirt in tray. Rub ink on to shirt with a sponge. When ink dries, soak t-shirt in water to remove the stencil to reprint another t-shirt. Enjoy!Update: New improved version added ultishirt2.stl . This gives the lettering a uniform spacing that is easily repeatable. This was derived from the Ult-Shirt by Charlotte: https://www.youmagine.com/designs/ult-shirt#!comments?data-id=306