Not Compatible with Project Manager

[Bezzier]

This doesn't work with https://github.com/Tantares/ProjectManager

Specifically, it can't get better over time.

I presume you are using the rollout name of the rocket to identify whether to load an old guess. If so, what's probably happening is that when Project Manager renames the rockets at rollout, it keeps GravityTurn thinking that it's an entirely new rocket.