Is this not a solution to floor 4, right side?
http://imgur.com/a/2PkRg The only thing I can think of is that the green node in the upper left isn't connected to anything, but I'm pretty sure it's impossible to connect it, and a floor 3 puzzle had a disconnected green node and that solution took.
Solved everything except that one, floor 7, and the balcony puzzle on floor 4, which I'm... really not having any fun at all trying to hammer into place for some reason. The random one on floor 6 was also rather tedious without actually being challenging.