Heater airflow issues

[davidd]

The teeth in the little gearbox that moves the flap to direct air between feet and screen are stripped.

I'm trying to work out how to get the motor and gearbox out so I can replace or rebuild the cog, as far as I can see it is held on by two very small, very hard to get to screws. Is there another way to get it out or some trick I am missing?

Has anyone replaced the whole thing with something better?