All good, an easy repair.
It did however differ slightly from what was in there before (Dyson DC24 Drawing w/ red kill button on side of cleaner head) in that this version has an extended spigot at the interface between the gear and brush bar that I had to remove. You can just see it sticking out the top left on the image, parallel to the motor. This may be required for other models. I cut it off to match the old unit, works fine.