I have a bank of 4 pins with an 8' ceiling above them, and I was thinking of screwing this directly to the ceiling:
http://www.grainger.com/Grainger/8020-Framing-Extrusion-5JTC8?Pid=search
Then I'd create an 8" drop post, with another 3' section of T-slotted 80/20 at the end. I was wondering if someone had a design I could steal, or a pointer to an "80/20 Construction for Dummies" site. I'd like everything to pivot and move, but then be able to lock it down tight once I'm ready to shoot. I have a Panasonic HDC-TM900 camcorder.
RE-EDIT: I found the 80/20 Training Center: