Level or slightly nose down is preferred for sway reasons. Also, you are not removing any tongue weight by adjusting the bars. If you like the way the bars are set but want the nose of the trailer down some then adjust the ball down and then re-set the bars to get them how you like.
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2017 GMC Canyon - CCLB, 4x4, 2.8L Duramax, ARE Z-series shell
2013 Shamrock 21SS
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