Ahhh... great idea, I didn't think to try CSS.

Setting the main_content width to 100% works, insomuch as it makes the right column as narrow as possible.

I had no luck getting a hold of the other column, either through the above example, or I also tried:

Perhaps, as you suggest, a much simpler solution would simply be to add a class attribute for that column, rather than removing it completely from the html.

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