Step-by-step to replace the HEPA post motor filter

Can someone please create a step-by-step guide to replace the HEPA post motor filter in a Dyson DC39? This is NOT the blue/purple pre-filter that is relatively easy to remove & replace. This is the post motor filter, part no. 922444-02, that is in the motor body. This is the closest guide I’ve found, but it covers more than just replacing the post motor filter: https://manchestervacs.co.uk/DysonForum/....

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There's a good dissembly video here, but he doesn't really explain much - https://www.youtube.com/watch?v=8LtXySaK...

And a motor replacement guide here- Dyson Cinetic Animal Ball Motor Replacement

Not sure how to remove and replace the filter though

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