as long as people have saved (backup) their patches (only talking from P400 to P513), they will just have to reload them after the whole updating process, right? if they want to reload them in P400 to P513 slots, they will have to delete factory presets in this slots to free up the space and reload their patches in those slots. In other words, if it's just 5 or 10 minutes time loss, it's not a problem for me.