Korg SR1 Sound on Sound

[John-O]

I have a few quick questions if any one on here can help.

1) I still use the SOS and my first question is when you finalize which file is best to do, material or mix? Or should you do both? I don't have a DAW yet so nothing to sync to. I just use it straight from the recorder for scratch ideas. I also noticed once I finalized both it wouldn't let me reopen the original files and overdub.

2) I read somewhere on here that you can master the songs on here once they are recorded. How do you go about that?

3) How do you individually adjust the level for the tracks you are recording?

Any help would be appreciated!
John