I posted on Facebook asking for clarification from the owner of the failed pulley as to exactly where he bought his pulley . . . I'll post back here when I get a response . . .

A couple of more things to digest in the meantime . . . Rudy developed what he called the Karmen (his spelling) 62mm supercharger pulley. His design utilized a smaller bearing (smaller than what had been used in previous undersize pulley designs) that allowed for adequate thickness in the pulley wall structure around the bearing. Also, Rudy's design was a hardened steel pulley (not aluminum). We need to be careful in looking at reports of failed pulleys to be sure we know exactly which pulley failure is being reported.

Another piece of the puzzle that I don't yet have all the information about . . . Both myself and LENIN bought our pulleys directly from Khang Vo (the manufacturer who made Rudy's pulleys) after the group buy that Rudy spearheaded was over and done. Our pulleys were "left overs" that Khang Vo still had and made available for sale. Some clues lead me to believe there were two distinct "batches" of these pulleys that were manufactured. I need to research this area a bit more but I think Rudy rejected the first batch for some reason and only moved forward to distribute "his" pulley when he received the second batch from Khang Vo. If that is true, then I'm now suspecting that my pulley and the one LENIN bought might have been ones from the original manufacturing batch. I'm going to ask Khang Vo about this and will post more information about what he reveals after I complete that additional research . . .