Allright. I'm building this dolly, right now, but before doin everything, I would like someone to help me find what head they used on this dolly. I've look on manfrotto, optex, gitzo website, and never found what I was looking for.
Here's the picture (sorry, I can't embed here): http://farm4.static.flickr.com/3094/3125277056_ecf9e72307.jpg