Thanks for the answers. I'm curious to know whether anyone has real world experience doing this, rather than theoretical. I only ask as I'm getting conflicting advice. When the Pro X was released Line 6 told me explicitly that programming from the Pro was NOT compatible. Some dealers are now saying otherwise. When I called Line 6 yesterday they said they didn't know, and that they would find out and call me back. I've heard nothing further. So forgive me for being cautious. But has anyone done this in a working situation successfully? Many thanks.