@Jose:
The scandoubler/flickerfixer actually performed brilliant (especially when using a little slowish CRT monitor) in the Amiga 3000. The 'combing' effect was never a problem for me as the SD/FF was only flickerfixing while using Workbench (can't remember a single game with high-speed grafics in interlaced mode). Only the standard mouse pointer had to be replaced by some hi-res mouse hack. So, for your average dtp work, playing about with PPaint and stuff like that is was really usable.