Not long ago I posted an article about how Mark added a friction arm to the side of a Manfrotto Fluid, and here YouTube member XCFloresX shows you how he's added it to a Fancier 717 Fluid Head Tripod. You can see how useful it would be to have something like this available on your Fluid heads. [Thanks Chris]
I'm not sure why these tripods are rare to find these days, but they do seem popular. I have several of these in the studio, because they work great and were very affordable for multiple cameras that remain mostly static or have slow pans. I have a short intro on these Fancier 717 Bowl Mount tripods (video found here).