I use my 300 f2.8 on a monopod...screwed directly to the foot plate. It works fine for football, softball and the like...but.... I am heading to EAA in a few weeks and am thinking that having a swivel head of some type on the monopod would be helpful. I do not want to drag the tripod in....but can if necessary. Anyone have a swivel head attached between the monopod base that foot of your long lenses? Pictures of said assembly would be most helpful and appreciated. Now that i think of it, it may b better to ask in the birding section.