I've had that image for months, and in a much higher resolution
The stopped on the back of the footplate is an interesting addition, and the curved crossbar is weird. I'm a bit more happy with the springs having bolts through the middle after seeing a lot of photos and videos in action, I'm assuming John is on only one pair throughout the entire video though.
The hoof being hollow is a bit odd, I guess it allows for impact and flexs a bit when landing, which should hopefully take a bit of the force off of the rubber, meaning it might last longer. Just theorising there though.
Lack of support rods is interesting, i'm still trying to figure out if it's possible to tilt the footplate at all like on the older models, as to do it you'd need to adjust the bolt right at the back up and down, and even on my high-res image I can't see any additional holes for the bolt to go through, or a shape like i've attached below