up grade I have heard several senarios. I started a thread with the same theme (Great Lakes). I have heard as low as 6 months (I think highly unlikely) and I have heard a year to year and a half. As far as time goes I have tt 750 and ME 80 which I hear is good. I got a post card saying they were reviewing my credintials but no call yet (that was about 2 weeks ago.) Like I said I have a thread going so check it out maybe someone will write something helpful on it