Indexing a new blend door actuator on a Chrysler LH car

There is some bad advice online about how to properly index a new blend door actuator on a Dodge Intrepid, Chrysler Concorde or 300M: people are taking brand new units apart to index the shaft to the correct position, risking damage to the new part and or shortening its life. Watch this for how to do this properly without risking damage to a part that sells new for more than $100.