As for the preview-bug, I think this is a Rev2-bug and not F0F7-bug as the issue is exactly the same when using Soundtower Prophet Rev2 sound editing software. Some presets don't sound as they should when they are previewed in the edit buffer. I am not talking about small differences in sound. Sometimes a preset is played only when pressing some of the keys and the init sound when pressing other keys. And the next time you press a key that played the preset sound it can play the init sound and vice versa. I just wanted you to know about this.