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ground connection is needed with the power supply mods, otherwise there is nothing to drain the noise to that is removed from the power line

I do not understand this statement. How do you drain noise to the earth ground? Won't it depend on the impedance of the earth ground? Isn't the earth ground already noisy from all the other components on it? How do you keep their noise out? Don't people use cheater plugs to avoid connecting to earth ground because of noise and hum problems?

Doesn't this also mean that all people with two-prong outlets should not use your modded Oppo?

Also some of us are using balanced transformers at the head of our systems with dedicated lines. Unbalanced power is only available using the dirty circuits, the last thing I want to connect to. Also only the newest PS Audio Power Plants are unbalanced. All previous units are balanced.

You certainly should provide a much clearer warning that balanced power and apparently two-prong outlets are not acceptable for your modded Oppos.