Ordered from the Cary Hendrick Chevy. Dominic is my sales guy, said he didn't know what the #251 meant either; he's been great to deal with, though. Not sure what my priority is...probably better that I don't. I know we did the workbench order together on Nov. 10th and i got my copy, good enough for me. I did just add the Boston Acoustic setup last Wednesday since we are driving the car home to Vegas. Let me know if any of you find out what my priority is, I'm sure it's the only customer ordered CGM 1LT/RS there.