Not sure how I missed this one :S Been looking forward to the third installment for ages now.
Totally didn't disappoint

I thought the detail in the normal bits was intense, but those 'interstitial' bits were just nuts... cables, rails, wall parts, piles of stuff everywhere, and all nicely lit. Damn.
At times it was kinda dauntingly over-detailed and a little busy for the eye, but as it reconstructed I felt like I got this lovely sort of relaxing feeling. My only concern is that it felt like there was a bit less in the way of actual puzzle and the lengths you'd gone to to lock everything down made it feel more enclosed than previous enjoyments, but I really enjoyed the map!
I found some unintended solutions that skip like 80% of the map, and the middle section is mostly walking, so there's no point posting unless you're desparate to see.
Thanks for mapping ^^
P.s. hurry up with portal stories.