Head for Manfrotto 680B monopod.

[mopar_guy]

Last year I bought one of these since the load capacity of the Manfrotto head was not adequate:

http://reallyrightstuff.com/ProductD...-AS-II&key=ait

[MattKing]

I use one of these: http://www.bhphotovideo.com/c/produc...tem_Quick.html

At least with either square format or rotating back cameras