I have been experimenting with my EM1 2 and the 300 for bird photography. So far, it's either handheld or ballhead mounted but I'm wondering if a gimbal head may be a good idea. Many years ago I had a Canon 500 which I used on a Wimberly Sidekick. It was a great combo but that was film ... It occurs to me that the gimbal head may be easier to work with over time but I'm wondering if there are any other advantages. I still need a fast shutter, IBIS does a great job, and high ISO is very good so why would I bother?