Components and Instances
Components and Instances are a great tool for modeling because they allow you to create one object and copy it as many times as you like while being able to edit just one entity and updating the rest instantly.
This picture shows some posts that are too thin too
print.
(Click to Enlarge)
Because these posts are instances I am able to edit one of them and
have the rest change automatically.
(Click to Enlarge)
This is extremely valuable is you are creating small posts
or supports for you model and you find out that they are not thick enough
that you can go back and edit just one of the components or instances
and they all thicken up at the same time.
