Originally posted by Tuomas Pirinen (he's the design supervisor from GW from mid 90's - early 2000s and responsible for WHFB 6 and Mordheim) on his facebook
Moving houses might be like chewing broken glass, but it does turn up lost treasures. These are the original notes on Chaos in WH/40K games by Bryan Ansell and Rick.
I will scan/type these up for fans when I got a chance.
Also notice the Slaaneshi Pink carpet of my daughter!
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I've attached his scans of the paper here for reading/posterity. Neat bit of insight from the way olden days.