The 1st video below is a Real User Demo Video. TO START:  Click the (>) 'Play' arrow in the lower left corner under the video. (video shows a former aluminum model; however the concept is the same. With the updated Nadeau 7-Way Cart(R), the "Pin Lock' method is used (inserting lock pins to lock the top tray to the base).

Note: To Play Video you must have Quicktime installed.

The 2nd video below is a FUN PLAYFUL Introductory Slide Show. Click the 'PAUSE' button in the lower left hand corner under the video screen (replaces the (>) 'Play' button) -  inbetween slides if video is playing faster than you would like.