If it can only control actions, not thoughts ,that is a variation of the Set Effect Limitation.
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Mind Control is an instant Mental Power w/ continuing effects.
The way you describe the your electrical remote control Power, it sounds like it only works instantly w/o the lingering effects.
Is this what you imagined?
Costs Endurance To Maintain:
"represents a continuing-effect Mental Power that costs END both to activate and to maintain. If the character wants to keep the Power working, he must pay END for it each phase; if he does not, in instantly stops affecting the target." (6E1 153)
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Rather than Based On CON, you might use Based On DEX which is more precisely about motor control.
Then rule that characters affected by Based On DEX Mental Powers respond not to "the first person to give commands" but rather to "remote control".
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Manditory Effect: EGO +30, Target will perform actions he is violently opposed to doing (-3/4).
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The Machine Class Of Minds? What is that exactly?
Do not most people's bodies essentially possess a mechanical element?
Should not this mechanic element render characters prone to certain Mental Powers that attack Machine Class Of Minds?
Idk