Ok... here, I have taken some screenies and added comments to show what gave you away. There's one more element I forgot to take photoes of: Open doors as solid brushes to show which door you can use and which one you can't. You did it in brainwash_f (those cells where the hostages were), you did it in fieldday. The rest is in the attached pics.
Btw, I finished the waypoint file for this map yesterday and playtested a bit today - it's really fun to play! Fast & furious, you could say...
If this map doesn't make it into one of the best 5 ranks (not only in my personal "chart", but also in the clan00 contest, then I don't know...