I missed this on here but I think I read the original topic.
From what I remember reading the SJ hoofs are Chinese. The metal bit the rubber fits on to is made by them. But there are problems with that because the Chinese rubber parts don't fit properly on the part SJ made..but that's something else entirely.
I think it could work well if the right rubber is found. Have too see what the cost per hour works out to be roughly. This or Jasons MK3 hoofies have to be the way forward. I used the original ones and they didn't really last a good day of bocking.
I found this awesome place the other day and they can make absolutely anything out of rubber. I thought about putting it to them. Probs based on the MK3 hoofy design apposed to the original.
I think you should let me test these ones naz