i thought the 575 replaced the 570 long ago and then the 576 replaced the 575 long ago?, how is it 2 years old? or is the 570 still in production? NOS? i really like my 576. was unsure about it in the beginning but i think i'm convinced it's better then a 372 at this point. mines gotta have 4-500 tanks on it now. most of which is fuel i have no idea on octane, what oil was mixed with or at what ratio! the 570 feels like the same thing besides the AT.