I don't have the hard copy of Zan's lameness assessment yet but when I spoke to his vet before he came down he described him as being 2/10 lame - the problem was bilateral but slightly worse on his RF.
Of course, his hooves are changing so much that even now he only has the top half of his hoof at the right angle and in the right place. You get an idea of how tricky it is for him if you compare this photo of him on arrival...
with this one of him today.
You therefore have to remember when you watch this clip that Zan's hooves (as with all rehab horses) are a "work in progress" and that his movement will improve again as the new hoof capsule continues to grow down.
Zan on a circle from Nic Barker on Vimeo.