no its a circle. it doesnt change anythin to spin it except for the groove thickness. one side is for .050 chain and the other is for .063 on the later models. the 450 may not have the groove for the .050.
i think it would work to remove the rust just fine. not sure if it would make chromium in the water. the wrenches arent plated with chrome they are chromvanidum. not sure either im not a chemist.
i made my tank out of a beer keg because i wanted a tank small enough that it was easy to move around. i made a base with wheels so i could roll it around when it has water in it. i dont have to mess with finding metal to put in it because the whole thing is stainless. i was just putting cast...
it does make toxic water if there is enough voltage and heat. thats why low voltage and high amps. if you have high volts and high amps it will heat the water and the stainless will make hexchrome in the water
i talked to a chemist about that and he said that at low voltage and low heat that the amount of hexchrome would be so tiny that it would not be an issue
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