I've only been MDing with he AT Pro for 1.5 months but am curious as to when to dig. I'm still learning the various tones, whether its a coin or bottle top, etc. As a newbie I would dig on a sound that sounded good even though the VDI numbers would fluctuate. I also would turn iron audio on to check before digging. However, I still seemed to be digging alot of trash. The last time out I dug only those signals that had a stable VDI number and seem to dig alot less trash to find those coins. Will I be missing out by continuing to wait for those stable VDI numbers, and not dig those that fluctuate?