heh - ok first note that you don't need to get all the platforms raised up to get to the final door (looks like you figured that out already) - just the one on the far left. However, you DO need to get a 1/4 flowing through the door - try to imagine arranging the squares in the "mechanical square" puzzles - you will need to arrange 4 squares so that at least one has 1/4 flowing through - extra clue: one of them will have 3/4 flowing through it.
heh - ok first note that you don't need to get all the platforms raised up to get to the final door (looks like you figured that out already) - just the one on the far left. However, you DO need to get a 1/4 flowing through the door - try to imagine arranging the squares in the "mechanical square" puzzles - you will need to arrange 4 squares so that at least one has 1/4 flowing through - extra clue: one of them will have 3/4 flowing through it.