Awesome man.
Suggestion, u can use something like sand inside the tube, cap both ends when you dip it in the hot dye water so that you dont get warping n whanot... u can also use this method to create pre bent sections of tube without kinks once they cool! (put sand in cap both ends, dip into hot water with or without die, then bring your tube out of the water bend it, and keep it bent till it cools)