Its a quality rig at a decent price point. Mine, I have two, both shift about unless I run two loops at one time. The only two other folks I know who've run them report the same; one right before they gave me theirs. That cures the shifting while eliminating the ability to adjust the cant while set up that way. That's not a problem for me, as it turns out I prefer the cant as it is with both loops. As for the hardware complaints, I've never noticed any rub.
Oh, and adding some locktite to the screws holding the loops might not be out of order, either.
Meriam Webster's: Main Entry: ci·vil·ian Pronunciation: \sə-ˈvil-yən also -ˈvi-yən\, Function: noun, Date: 14th century, 1: a specialist in Roman or modern civil law, 2 a: one not on active duty in the armed services or not on a police or firefighting force b: outsider 1, — civilian adjective