@RaspingLeech
Nice series!
@Rundrewrun99
I'm afraid it still has a lots of double black lines (or rather groups of black pixels) - on the propeller tips, wings and engine cowling.
And the zig-zagy curves, they all still there.
Here's what I mean (the example is someone else's drawing, that suffered from similar problem -
Red digits are number of pixels in each 'step' - in the top drawing, the line which should be a smooth arc in real life, is actually a wave. In the bottom, it's how it (IMHO) should be.