Using an A520 with the RGB out in my 1200 seems to be more stable and sharp than the built-in video-out.
The drawback is when someone bumps the Amiga, then the A520 comes loose and blow out the fuse of the RGB! :headwall:
Then I need to open the 1200 and replace the died resistor (the fuse itself):headwall:
Now I have a C= 1942 monitor, not to worry about.:-D