So dark, blurred and wobbly you can't see a damn thing. Then I found an upload by a young kid that is spot-on. (Just ignore the two bursts of music). His demo is simple, clearly visible and solved my problem. Takes a young kid to do it properly.
Last time I tried this on my own I spent 2 hours because apparently I lack any mechanical skill at all, but your video helped me do it tonight in 10 minutes. I have nothing but absolute gratitude.