Been reading the GB Pro Manual. Looks like a good unit; however I don't see a clear statement on whether or not the ground phase reading is visible in disc mode in the center of the display whenever a target signal is not displayed. I assume it is, otherwise it would not be very handy in keeping track of ground phase in relation to the internal ground balance setting. Am I correct in this? Also, how well would the GB Pro do on nugget hunting in relation to the AT Pro? I see that both have outstanding target separation (Recovery Speed). Thanks for any other input!