Venus crescent in morning twilight time 21st April

I wanted to show that Venus has a crescent too, just like the moon.
I only have a window of a week or so, around mid April, to capture a thin crescent
(Venus phase between 10 to 20 degrees). I had hoped to get less chromatic aberration and a cleaner shape when Venus is higher.
I had taken several rounds of an exposure bracket and picked a "clean" shape at 1/1600 second ISO 100. (The faster the shutter speed, the closer I get to the true shape of the crescent).
I still had to trim away the colour fringe and slim down the crescent.

William Optics 61 360mm
Nikon D7500 APS-C 1.5X

Various problems: size and shape
1. The Venus crescent was too small: crop and zoom.
2. The shape of the crescent was not smooth: take many shots to pick a clean one.
3. The two sides of the crescent had chromatic aberration: cut them out.
4. The width of the crescent was wider than the given "19 or 20 degree phase"

Darktable was used because I find some features suitable:
1. JPG was easier to work with.
2. Velvia (colour saturation) was dialed down to zero to reduce the colour fringing.
3. Local Contrast dialed up to brighten the crescent.

4. Levels: a Black point was chosen to darken the background and
it also caused the crescent to slim down! closer to a 20 degree phase.
5. Curves to further make the crescent slimmer.

6. Crop to the smallest and zoomed in to 200% to make the Venus crescent bigger.
7. The photo will look grainy if zoomed in.