Hello, I usually run my T2s (I have 2 of them) in disc mode (disc 10,tones 2+, sens as high as I can). The tones give me most of the info I need, I rely on VDI only secondarily. The VDI is very helpful though when used properly (depth etc really effects numbers). My question, in all-metal mode the machine still gives VDI readings...are these readings just as accurate as when they are when used in disc mode?? I know the VDI is a separate system from the tones, but is the same VDI system used whether you are in disc or all-metal? Thanks!