I believe the proper spelling is colars, but since you live in the UK, I guess I would let it pass if spelled colaurs ;)
In all seriousness, I too enjoy the screenshot comparison, it is very pretty.
Among the simple but beautiful changes I've noticed is how you brighten the engines, Ady. Thanks, as always, for your work. Every day I look for that magical "I'm done" phrase in this thread. Still very excited :)