i want to remix some oldies that i recorded on a yamaha md4. Will everything work when i put the disc into an md8? I know this seems like a silly question, but it's been a while since i used one, and the technical side of music isn't my greatest strength. If i want to add tracks to the 4 track recordings, i guess i'll have to clear out something else right? any info appreciated, i may bid on an md8 right now.