Just some detail thing, but uhm…
In the corner of the ramp you can activate by repairing the stairs, there is a slight bug.
http://puu.sh/jwDt7/8bf92bc061.jpg
http://puu.sh/jwDjL/0f8725b7eb.jpg
Luckily you can not see any person with this, but is still a slight detail thing. Besides. I don’t even understand why you can even stand in the pipe, but awh well.