Got a Helix about 3 weeks ago. Finally, got the chance to sit down and really check it out over the 4th weekend. Bought it from a store that only allows returns for 14 days. When the loop is playing the volume sometimes cuts in and out. If I tap on the unit with my finger the signal gets scratchy and cuts in and out as well. Sounds like a guitar cable is being plugged and unplugged- but it isn't. Seems like I got a lemon and maybe there is a loose connection/wire somewhere. Can't return it - obviously it is defective and now I have to deal with warranty and repair on some thing that has less than 20 hours a of use. -- Everyone says they are " built like a tank" --- unfortunately not the one I got. Anyone else have this problem?