New XP user, only have about 5 hours behind it. It seems the depth is not good. It may be for a few minutes and then goes back to (air tests) needing to be 3 inches from coil to get VDI. At this point I have only found deep iron and shallow clad. Starting to loose trust in the unit. This happens in all of the stock programs and a few that I have found here and there. Am I doing something wrong is is it possible the coils is junk?