Welcome Swallow. 200 shots later....
I managed to get 2-3 good ones, but, they are a challenge. The tricky bit is trying to get the 5D3 to keep up with the focus. Or, more to the point, trying to learn how to track an object that moves at random. Sometimes it works
5D3 with 300mm f4
5D mk3 with grip, 300 f4 L, 100 IS Macro L, 50 f1.4, 50 f1.8, 40 f2.8 pancake, 35 f2, 580EX II, 1.4x TC III, Zeiss 15mm f2.8, 24 f1.4 L