Use the "new technique" you learned in the three previous levels.
The first part (when you figure out which parts needs to be the first) is quite hard to solve, but it is solvable. I dont want to put detailed hints/solutions here in the comments, but if you want you can reach me on twitter @AhlmanOve
I won't spoil any puzzles. I've used the "New Technique", to pass from the room I think I need to start in, to the room with the exit. From there I can get to a 3rd room... where I either maneuver back to a solvable position in the second room or get to a fourth secret room with a hidden exit. If you say it IS possible to solve it, I don't need a hint. I'll keep working on it.
