If anyone is having trouble with the switch puzzle towards the end of the chapter...
EDIT: A few commentors have stated that my solution was different to theirs. If this does not work for you, I am sorry, as it does seem to be a bit random.
EDIT 2: A common solution in the comments is switches 1, 3 & 5 UP, with 2 & 4 DOWN. I hope that this helps.