I bring this out occasionally, a couple of time recently. I have still have it, the original map of sell factory, before they made the major cash hq downgrades of sell factory.
Back then soloing was harder, plus before they equalised merits and made so it was calculated as one and not along the way, the ultimate run was the infamous up and down run, gaining more then any other full run.
647 merits it was through the
side entrance to
oil room cogs through
warehouse, up and down the
silos(not central), through to
gear room and
front entrance , and
boiler room , taking out pipe room and back up to
centre silo
Not sure if you had to do pipe before oil or after boiler room, but same difference
'Keep it Kool

'