Since we're on the topic of weird old techno records... and Aphex Twin/Rephlex records.
I have to mention Analogue Bubblebath Volume 3... this one takes the cake. Comes in a brown paper bag, with a sheet... INSTRUCTIONS FOR USE [Tracks 4/5 located at lock-groove] For listening in the domestic environment, arrange the cartridge connections of your tonearm so that either the left or right channel are redundant in order to hear each recording individually (alternatively set the balance of your amplifier/mixer to the appropriate position). Increasing the proportion of low frequency through your equaliser should limit the effect of inevitable "cross-talk" between tracks. If your equipment has a mono select facility, employ this to benefit from omni-channel output. Weird... G