The video I posted is for 6501 not 6510.
The 6510 has an extra screw/bolt attaching the lever to the rest of the mechanism, but it’s too tight to get a socket around, and too tight to loosen with a screwdriver.
Haven’t tried that. But it had fold up tabs to stop it rotating, being reverse threaded as well seems a little much for something that’s only there to retain something. Doesn’t make sense for it to be reverse thread.
Hit a brick wall.
The video I posted is for 6501 not 6510.
The 6510 has an extra screw/bolt attaching the lever to the rest of the mechanism, but it’s too tight to get a socket around, and too tight to loosen with a screwdriver.
I tried.