The 6-1 vic coil used grain oriented steel.I saw them in his stuff.Also that coil was designed for the water injector only!
DON'T MIX UP SYSTEMS!!!!
Now to address the electron extracting,Why are you even concerned with that process?Are you looking to remove the electrons to get the process started?If thats your goal than your ass backwards with your thoughts.
Until you can get high voltage(+1000 or higher) across the water in the cell,you will never be able to sepearte the gasses in the first place,let alone extract electrons.Because much higher voltages(in the 1000's) will be needed for that to happen.So you have to seperate the water first with high voltage,than you have to get the voltage even higher to get the electrons out.There's no way around that.The electrons are freed when the water molecule is seperated.The extraction process isn't for pulling any other electrons out.The electrons come from the one's holding the hydrogen molecule to the oxygen,if not extracted,they will link back up with the hydrogen as soon as the voltage pulse is switched off.
Electron extraction can only happen after the water is seperated.So any talk about performing the extraction process is futile,without the ability of making high voltage and seperating the water molecule first.It can't be done the other way around.
So we need to seperate the gasses first,and then only after that step ,can we do electron extraction.
So get to work seperating the gasses and forget about electron extraction,it'll never happen any other way.
Thats all I've got to say about that!
Don