DIY - Repair Door Lock Actuator Locking Mechanism

Molecular Sandwich at instructables.com provides a step by step detailed and illustrated guide to repairing the door lock actuator and locking mechanism on his 2003 MCS, a part that MINI says is "non-serviceable," but as Sandwich says,

I was sick of reading about the countless number of people who have been forced to replace this poorly designed component with a new one ($130) because BMW made them "non-serviceable". This unit IS SERVICEABLE - if you are clever enough ;)