I was trying to convert this rather awkward looking area into platforms coming from either side, stepping down to meet in the middle, but I don't think it's possible:
https://dl.dropbox.com/s/mcj0sk3qsc6pib4/11-10-20_8-15-19%C2%A0PM.png?dl=0
You cannot place them next to each other if they are on different floor levels - you get the usual block cluster error. And if you lower the platforms on the higher level, they keep their edges at the original height.
https://dl.dropbox.com/s/60o6kaq6hlnnlmo/11-10-20_8-20-26%C2%A0PM.png?dl=0
Shame :'(