Yes, you can. You can configure your soft keys to stop and start the recordings too. Re the stereo copy, you can’t record multitrack and stereo using only the qu-drive at the same time. One way around it is to record 18 tracks to qu-drive, with 1-16 being individual channels and 17-18 being LR (they’re all freely assignable,) then give your acts copies of 17&18. You could also record multitrack over USB-B to a DAW, and simultaneously use qu-drive for a stereo recording. Finally, you could use qu-drive or the USB-B for your multitrack recording and route your LR to the alt-out socket, and use that to feed an analogue recorder of some description.