Questionable materials

The heads of the mounting screws it came with were disintegrated by my electric driver -- so I instead used the nest ones. Also, as others (I think) have mentioned -- the plastic washer to tighten the angle of the mount in place is indeed plastic. It keeps coming loose when hand tightened, and is at risk of breaking if a tool is used. Otherwise... it does as advertised. Some better positional locking mechanisms along with some higher quality components would be appreciated and worth more money.

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