The Woodify Wave & Twig come with a double-sided tape. To apply: 1) try first to find the best position for the rest, without removing the adhesive cover. Use a pen to mark the placement on the tube. 2) remove the adhesive cover and place the Wave GENTLY on the tube, without pressing too much and check with your hand in place if the position suits you. Be careful to not press too much on the Wave. In this step you might be able to remove and re-attach the adhesive a few times.  3) once you found the correct position, press firmly with both thumbs on the rest, so to really attach the Wave. 4) Don’t touch the instrument for 30-40 minutes, in order for the adhesive to really seal.