Odd, isn't it? I spent ages re-drawing the SD1 wiring schematic in colour, with the actual wiring colours and tracers. Making it much easier to follow over the factory B&W one. And done as a vector drawing so you could enlarge it to any size with no loss of definition, unlike a scan of a page. Must have sent it out as a PDF by email dozens of times. And few even bother to say thanks.