I did not see that post. I hope they see this one!!
What I used was a drinking straw and a small rubber band. I cut a piece of the drinking straw to the size I wanted between the chicks legs. Then I fed the rubber band through the straw. I hooked the rubber band to each leg with the straw in between. It took 2 people. I don't think I could have done it by myself. I'll try to track down someone to help me with a photo.
But here's a video of what I did:
I put the chick into a tupperware container, then walked away for 2 minutes, came back and the chick had escaped the container.