Ever since one of our chickens was taken by a hawk, we had a "playground" enclosure attached to the secure overnight house for our chickens and pigeons. It was originally made from PVC tubing and not very stable.
I decided to replace it with Makerpipe connectors and metal tubing and the results are great. Very secure and I was able to install roosts and platforms, which was impossible with the PVC pipe.
A friend of mine already ordered parts for a similar project to build an enclosure for her raised beds.
So easy and quick to make and adjust.