Aspect ratio: Laserdisc 1 from the previous comparison wasn't my capture...
About aliasing: the final version use different avisynth scripts, so low def is not that good, while final result is better IMHO... here you are the comparison between the raw laserdisc capture (bicubic resize), and [spoRv]:
http://screenshotcomparison.com/comparison/112910
I don't say [spoRv] version is perfect, at the contrary... it's just my preferred compromise, that's it!
If an unfiltered version is so necessary, I could do it, just let me know if an x264 8Mbps version should do...