The second picture I posted shows this pretty well (
http://www.hempcultivation.com/420/a...&postid=255888).
We used shelf mounts (metal) from the hardware store. The ones that only have one eye instead of the thicker ones with two. They are convenient for tying small guage wire.
The only problem we've had with this system is that it's difficult to get around. It's the right size that if you had a good sized room with a bit of walk space around it training would be fairly straightforward. In the closet it got difficult to reach the back corner.