I still like to use the 430EX as my hair light because there are many way to trigger it: the 580EX, ST-E2, eBay trigger, or the Wein Peanut slave. This project started when I made a strip box for the 430. The strip box frame is make of welding rod, the size is 24x12", about 15" deep. The cover is made of silver automobile windshield sun shade as inner lining, and black fabric on the outside. I use some black project paper and build a grid and staple it on the openning of the strip box.
The box is connected to the boom arm via a small ball head. The weight of the box/flash gives a natural 15-20 degree tilt, but I can tighten the ball head to make it pointing straight down.