HiJonny,
You are right, the diskettes for KN 5000 and KN7000 are not the same.

The conversion process is simple. First, Konvert FDD is inserted and the desired keyboard (Korg, Roland Gem...) is loaded. After that, insert the floppy disk from the other keyboard and load the rhythm. The result is not ideal, but the Style works and can be further adjusted.