I owned one of these Flickerfixer and it was great:
-it works with HighGfx 1024x768 screenmodes (Indivision HighGfx screenmodes come from this)
-it shows even super-hires-laced as a rock stable screen.
-it doubles everything: even VGA modes are doubled from 31 to ~64Khz.
-it has video composite out
Right now it's a very good flickerfixer for A4000T
