A very fine sheet!
It is always very difficult to reach the detail level on small parts. BTW I would suggest some modifications:
windows should be blue with black frame... you don't recognize the white pixels as windows
rail should be more evident... even if the become larger than real
I played on the propeller because there were too much black pixels
and also I changed the hooks and the main rope.
I don't like black lines with gray around like on the top... it seems defocussed
Here is a comparison
PS: It would be great to see also the crane/equipment