My player has loads of duplicates, loads of old songs that I don't want on there, loads of stuff where the tags are wrong and loads of stuff that I have since re-encoded at a higher bitrate

So, I want to start again from scratch. Rather than delete each song in emplode and then synch, is there a way to format the hard drives (do a quick format maybe?) and start again?

Use the Builder image. Full instructions for using it are part of the Disk Upgrade Guide.

Do everything in the disk upgrade guide except for the part about opening the player and installing disks.

Thanks