Tying off to a hitch sounds like a good idea. I definitely don't have a vice this secure.
The small, captured, threaded fasteners inside the swing arm for the hugger and the aft trim pieces don't all look well attached in my swingarm (a couple are a bit *crooked*). I would expect a serious session of beating the fire out of this thing would be likely to dislodge them. I still use both the hugger and the trim pieces, so I would rather not trash those fasteners in this process. Hence, the pictured capture method using Nylon spacers and cinching the fasteners up tight. A *precaution*, if you will.