Sebo Airbelt E Series Kombi Head:, How to Open It?

[macman]

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How do you open up the Airbelt E Series Kombi head to clean it? It looks simple enough. 2 screws at the back: off, 2 screws holding the metal plate: off, then 2 smaller screws under the plate next to the wheel axles: off.
But it still won't come apart. Something else at the front end is still holding the casing together, but what? Possibly more screws under the wheels, but I can see no way to remove them?

[MVacs]

We usually just do Kombi heads with the pressure washer.

[macman]

I could resort to that. Clogged solid with dog hair. But it's just got me irritated now, because it's clearly designed to be opened up.