Well first of all, a big thanks to Terminalvelocd for selling me his BenQ 1620 pro!
Now that I have a proper benQ based drive I can scan CD-Rs with far greater detail than ever before.
Basically, a long time ago I burnt @ 1x for my PS1 backups. For some reason the discs would always skip when playing cinematics. I was told to use 1x only by n00bs and I thought anything faster would = coaster lol. So I put up with the crappy skipping problems and played my backups.
Now I scanned one of these skipping discs and finally saw the reason it may have failed to play perfectly in the PS1. I used Pioneer 8x CD-Rs (dark blue discs, not as dark as Verbatim). Two burns I had of resident evil 2 worked brilliantly, not sure if I accidentally burnt @ 4x but here’s some results, and it kind of reflects the importance of jitter, even on CD-Rs.
First scan = an original game
Second disc & advanced scans = crappy 1x burn
Third disc & advanced scans = good working copy, possible 4x burn