There's not a roofer within hundreds of miles of where I sit that knows how to spell copper, much less have some
Mashman, don't give up halfway through a run and start swappin' stuff. Geeze... There's a learning curve to anything, and panicking and giving up halfway through one run won't learn ya nuthin'. Could be you need more power, maybe less. Very likely less. My last run was at 750 watts, and it was great! Was the column insulated? What was the ambient temp? Air movement? Was this with the plates as in the photo(with fins) or without?
That you plates held low ABV is great! It tells us that they're working, since water would not get up there on its own; the alcohol vapors were re-distilled, leaving low ABV behind. Nobody else seems to be getting the dirty, oily goop that I get, so there may be something I'm doing with my washes, or perhaps with my still itself, that causes it. But fact remains, low ABV in your plates is great news. Remember that the goal here isn't high ABV, but slightly higher ABV with all the flavor, like we'd get on a second run, or with a thumper.
From here forward, don't abandon ship so quick. Finish the run, and try things within the run, like wrapping the column, or blowing cool air on it with a fan, or whatever you think of. Make notes, and try again on the next run.