Hello. I recently upgraded from an At Pro to a minelab excalibur... ive only taken it out once so far but i ran it on pinpoint all metal mode.. i couldnt get the disc mode to work right. My question to other excalibur owners is what settings (sensitivity and discrimination ) do you set your machine too. Im just wadding in fresh water lakes... any help would be appreciated im planning another beach trip in 2 weeks and im hoping to get a better handle on this detector before then. Thanks.