unfortunately, yes. 6 or 7 ounce copper isn't exactly available at your local corner drug store. Wherewolf (andy) on here found some 6 ounce copper. You had to buy it in bulk. Minimum of like $600 or $700 for a big sheet that they would cut down for you.
Also, for a 1000 amp controller, the LEM is more expensive. Still, not THAT expensive.
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