Hi all, I just discovered something you may all know already, but I didn't. Thought I'd mention it just in case. You can look frame-by-frame at YouTube videos (at least, it works on my Mac) by stopping the video and then using the right arrow key (left arrow to go backward). Each keystroke moves you one frame. I was looking at the London M1x final:
and at about 10:14 in this video there is a great shot of Drysdale from an angle that shows the entry of the blade at the catch perfectly. Frame by frame, it's quite fascinating.