I used to compete in college. The person in the horizontal chop has great touch - perfect cuts!
Never did see a handle break, but you're right about the nylon not stopping a runaway head. Those heads are made of key steel, and are razor sharp when correctly honed.
Nice photos.
Ive seen plenty of heads fly off handles from the days i cut wood...bad fitting & maint wise that is. I used plums with rough old gum handles but i noticed these fellas used hickory handles. Ive used hickory & they are beautiful handles.
That bloke was amazing with his accuracy.



