IRIS Dog Gate - Large to Small Panel Joiner

I have both the 4-panel (short) and 8-panel (tall) [IRIS Pet Pens](http://www.amazon.com/IRIS-Indoor-Outdoor-Plastic-Panels/dp/B00D5P846Y/trackzerosystems) and needed a way to join the two panels together.

So print three of these, and run the hinge-posts down both sides, as shown in the photo.

This thing was made with Tinkercad. Edit it online https://www.tinkercad.com/things/9ajEHHlYL7S