I didn't think I was arguing.

Not sure where you think I was, not my intent at all.
If it's better to run without probes then so be it. I gave my reasoning and the disclaimer that this was how I understood it - if the reasoning is faulty then I appreciate the gesture of being corrected. So what you're saying is a "ground fault" is an unbalance of hot and neutral? Ie., it doesn't mean there's current on the ground wire?
One point though, I would rather lose a tank on a long weekend than my life. **If** it really came down to that. But it's comforting to note that the absence of a ground probe doesn't mean you're at risk.
I just don't like being electrocuted is all.
Peace?