I wanted to clarify that the bouncing isn't the fault of the 1Up, but the leverage exerted by an almost 24" moment armSame. Really the only thing I don't care for about my 1-Up is that the tension bolt that presses it into the receiver loosens over the course of a long day of driving. I get paranoid the loaded rack will walk its way out of the receiver.
Soooo ... I drilled a hole in the bottom of my receiver hitch that aligns with the threaded hole on the tongue of the 1-Up -- the hole that the 1.25" to 2" adapter usually bolts onto. Instead of bolting the adapter to the 1-Up's tongue, I run an M6 bolt up through the hole in the bottom of the receiver, through the adapter and into the tongue. A once-around wrap of packing tape keep all the pieces lined up for assembly.
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