Lost, as in: some are no longer attached/linked in their original place.
Lost, as in: there’s no obvious record of the file name in the original place.
Lost, as in: several attachments are mentioned in the text in this thread, in particular a circuit diagram and a 'scope trace, but though the images that appear are listed on GitHub, I cannot see the others. I could not find the zipped file that I attached to the final post, and I know the name because I kept a copy when I got it off Martin. So that attachment has definitely been lost, or is not listed and does not show in a search.
[Edit]
Wayback Machine gives the missing files as:
Ampy_meter_decoder.zip 212.8 KB
energy monitor pulses.xls 252 KB
5192j.xls 395 KB
and the one I know about:
Ampy_meter_reader.zip 1.17 KB