Don't worry I'll probably get a roasting over the grain in my release when I'm finished, but the grain is there only because I'm not using any filters that do any sort of temporal smoothing, I'm getting excellent clarity from the PAL laserdiscs so much so that temporal smoothing isn't really needed.
A friend of mine has a decent £300 soundcard+breakout box setup which I'm planning on using to capture the audio from my definitive collection at 96khz, so that any noise reduction I apply to it will be done before converting down to 48khz for the PCM audio on the DVDs. I've decided to make my set dual-layer so will be able to afford the space PCM takes up, as well as the commentary audio, 5.1 upmixed audio and extras, just means distribution will be a little difficult but I'm mainly making this set for myself so...