I also called SD:
- 48k max sample rate.
- No CL-9 compatibility (though they admitted they've been asked that more than once already).
- No idea if Petrol will make a bag.
- Will indeed record MP3s, not sure if it can "replace track" with LTC like the 552 does.
Looks great, just wish they would have crammed it all in the same foot print of the current 552.