My "long" lens is a Canon 400mm f4 DO which I use frequently with a 1.4x on a 7D. Although I use it most of the time handheld, there are times when I'd like to use it on a gimbal head. I have a Wimberley WH-200 on a Gitzo 3541XLS which was fine when I used a 500, but now seems like overkill for the DO. In fact, the head seems to act stiffer with the lighter lens on there. I don't anticipate ever going back to a heavier lens so I'm considering selling the full-size Wimberley in favor of getting a getting a Sidekick to use with my Acratech head, or buying a Mongoose 3.5b. Either combination would be much lighter, and probably better matched to the lens/camera combination.
Thoughts/suggestions/recommendations?
Thanks.


