Good info. Another question: You mention good and bad GTIA. Does this explain why my 800XL has notably cleaner video than my 130XE (I dont recall if I had composite or s-video cable - its been years since I payed with them)? Also, does anyone know if there are many demoscene productions that require the extra RAM of the 130XE? Also, if I setup this PAL system for demos, probably most games will be not-ideally running with extra scan lines and 50 vs 60, correct? I could just swap in and out that NTSC 800 XL I have already for games, I suppose. Thanks.