No, I didnt have to use the flash tool of his web, just this config tool, so I don't see that "reflash all", but just apply.
This is HighGFX, full screen and the screens now are centered.
(Edit: Yes, I'm planning a "transparent" Amidock for my AmiKit Real 2nd update).
Edit: XTreme works (and it was also working before with my new LG Tv), but it eats too much chip ram.
But I've got to change still the configuration, as my Booting image I use for AmiKit isn't right yet.
Edit: No, it seems the config tool has to be improved for this, as booting it doesn't work right a booting picture like I use.