I discussed this with one of our Melbourne Technics group members who uses both a KN1600 and a KN5000 (also a KN6000). Her experience is that most KN5000 files will load directly into the KN1600 without the need for conversion. The exception is custom style files (*.cst or *.ast) which are not used by the KN1600. To load KN5000 styles into the KN1600, the styles need to be copied to the KN5000 composer memory and then saved to a disk from which they can be loaded directly into the KN1600. KN1600 files can't be loaded directly into a KN5000, nor will the standard conversion disks supplied with Technics instruments enable you to achieve this.
Len