tflak
Veteran
One add-on I love is a leveleling head between the monopod, & "fluid" head.
http://acratech.net/product.php?productid=3&cat=2&page=1
Have been using a couple of these for about 3 years and also love them. Hesitated to buy at first due to expense, but have gotten lots of use out of them on everything from monopods to a Gorillapod Focus, and sliders. These things are top quality, smooth as silk to adjust and never slip when you tighten them down. And they have a nice large level that's easy to see.