It's very odd, Im unable to get amps to push any higher then 0.3/0.5 amps when anything aluminium is placed into the tank using it, I'm using an aluminium half inc unf adapter which has the positive directly connected to a (sanded) bare patch of aluminium as has the part I'm wanting to do which is half inch unf female threaded onto the part that's positive. I'm unsure where the issue lies or if the supply is faulty perhaps ?

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