Aurora stack merged with partial Star Trails from the same batch of images

This is from my back window at Beaumont, Jersey, Channel Islands.

This location is at 49.14 degrees, close to France, so quite a powerful Aurora to have moving lights far down.

Canon R3
Canon RF15-35 2.8L
20 second exposure.
ISO1600
F2.8
24mm

Step one: Adjust the images. I took them at 3700k as this is said to be good for Aurora, but I found this too blue so adjusted up to 4400k. I then adjusted the brightness levels to how I liked it. I turned down orange and yellow as the roof tiles were too bright and distracting from the Aurora and sky.

Step two: The Aurora was moving around and also moving from left to right as a whole, so using Sequator I stacked enough Aurora frames to show the complete width of the display.

Step three I used the same batch of images to create partial Star Trails using a masked area in Sequator.

Step four: I merged the two images using Cyberlink PhotoDirector, such that both images combined (no fading of either image).