That looks pretty damn awesome.
There's a few bits you could fix, like around here:
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At the sides, where you can see that you have smudged/erased it away. And also at the top of the roundish bit: it doesn't do a smooth curve.
And here:
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Again, the bottom bit doesn't follow a curve - it's kinda bumpy.
Also, this bit:
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Isn't symmetrical to the other side.
But, all-in-all it's awesome.