How are the XP WS5 headphones compared to the Grey Ghost with the puck? And, nothing is being said on the 4.1 update. What is new on this. I had a problem the other day. I didn't have the headphones on when choosing a coil and when I got to the location to metal detect, no coil. It had been a while and I had forgotten how to pair the coil to the head phones. I finally got it. I guess that is the price being paid for buying more expensive coils than we probably need anyway. If we just leave the coil that came with the machine, no trouble........Thanks....