The knobs on the adjustable poles mark/dent the metal, no matter how soft you tighten it.

The fatal flaws on our stand were the two knobs that control the height of the top shelf

RTA-B002, Color WG01, part number 11 (Plastic Cover / Screw Knob).

and it is only a matter of time before someone overtightens the knob, breaks the plastic piece, and the top shelf becomes totally useless

Unlike other reviews I have read, the laminate on this cheap-o product arrived in fine shape

Makes me happy b/