Yes I had the same issue with Mountain Man is that he has no cores, I would have loved for him to rebuild one. I also talked to him by both phone and email. I did buy a CCC core to send mountain man but Steve found the guy in Largo Fl and they had one ready to go. Got it in 2 days and got my core charge back 4 days after I sent it back. I did have a fast idle issue with it and call them to see if they could talk me through adjusting, instead they just sent me another one! Got that one in 3 days and put it on yesterday and it seems fine. I don't like recommending things but was happily surprised with this one !