Note that inventor's / 192.168.1.1/24(rw,no_root_squash) line will also allow us to mount directories inside /. For example, if inventor's /usr is on the same physical filesystem as /, and you are only interested in mounting inventor's /usr on sidekick, you could type:

# mount inventor:/usr /mnt/usr

Inventor's /usr tree will now be NFS mounted to the pre-existing /mnt/usr directory. It's important to again note that inventor's /etc/exports file didn't need to explicitly export /usr; it was included "for free" in our "/" export line.