I'm certainly glad the challenges are back. I was too busy for too long. I was a little upset when I finally came back to the forum and saw they'd been put on hold. To celebrate, here's my first entry.
Most of the elements are just copied and rotated around the center. Once I had everything in place, I added a nice FFD cylinder modifier to pull it into a nice concave shape.
Software: 3DS Max
Modeling: 48 minutes