Hello!
I'm a trying to remove the lock tumbler on the exterior door handle of my 121 Amazon. I have the handle off the door, and can open up the button mechanism, but it's not clear how the lock tumbler comes out of the button.

With the key inserted, the lock spins 360 degrees around, but I must be missing something that will allow it to come out of the button.

I would appreciate any insight or advice on this. Trying not to break anything! :-)

Thanks.