This is the sort of thing I like to save, but it probably will be a while before I get a rotor.
Was this going to "clean and reassemble"? It looks like you got interrupted.
Originally Posted by Timmycuddler
If that didn't fix it disassemble again and remove the gearbox.
Don't lose your button!
Back out the larger of the two allen screws until it is flush, like so.