Outstandingly customisable; great aesthetic improvement

I did not expect to write this about a mod like this, but I have rarely played with a mod this polished and customisable.

Not only do the effects look really good out of the box, they are quite remarkably customisable across like four pages of configuration.

From the sample rate, the colour, lifespan, the width, custom patterns, all the way to whether the contrails should fade, get wider or narrower based on velocity or distance and what exactly those variables look like; practically everything is customisable.

I use it on a server (client-side only) to see actual persistent contrails in the sky from other players flying overhead and it is genuinely so amazing and adds a lot. I also have noticed no performance impact whatsoever.
Big recommendation.