I have been following along nicely, but I have hit my first bug can’t seem to squash.
I have a working rocket, when I add the audio source to my prefab, the rocket suddenly gets much heavier and won’t get off the pad.
The mass / drag settings are the same before / after. When I remove the audio source, the behavior returns.
Edit: Ahh I fixed it, deleted the prefab and re-dragged it.