Pulling the old ones off is easy, but it seems to be best to back-out the two screws that hold the speaker in the earphone part. 1) this thing is easy to build, but better give it a good 1-1. The main character looks like the guy from, "Pretty Fly for a White Guy. There’s a definite learning curve to putting them together, but after a few, it’s easy enough. 5W but W width shoes are hard to find, so I can usually wear 8. Its unfortunate that I needed to return it. Did not send them back just going to keep and wait for my daughters feet to grow For other exercises such as dumbbell presses, etc. I got some pliers and generally straightened the bend panels, but it was a nightmare to assemble this despite that effort. Connessione superstabile, il Bth 5.