no needles or thread, this is all surface attachment of plastic on a solid canvas. browsing the net is much easier, than it was in early twenties. or even more frustrating, you don’t know where you’re supposed to go next. height may be adjusted quickly and easily. warm in the microwave oven on medium (50-60%) for 2 minutes. here is one of the book’s finest recipes. at that time i'd never spent so much on headphones but honestly it's changed how i want experience audio. but this is a game of numbers. repeat steps 4 and 5 until you have added all your steps. 