Re: inspection!
During a kitchen remodel in my old house, I had mentioned to my electrician that when we touched the metal rim around the sink and the refridgerator door at the same time we would feel current. He found a run of knob and tube that a previous owner tapped into incorrectly. He removed the defective run in the wall, but the rest was in good condition so he left it alone.
Think about it, there is +/- 14 1/2" between the wires with knob and tube, with romex they're only seperated by two thin layers of PVC sheathing.
If it is sound, and there are no obvious defects (or incorrect alterations), why mess with it?