OK, a couple bad icons here. But am I the only one who thinks the wrench metaphor actually looks good?
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At this point, does it need that residual variation or is this just adding noise? Also, a shape inside a shape inside a shape inside a shape isn't anything anyone is likely to parse – how many bits of information is this? So maybe just go with a simple default wrench icon for all of them?
If your icon loses to a yellow cube, it is not a good icon.