[Carrion] MOD Challenge : Armoured Science Complex

After a long time, some Carrion mod maps were posted on Steam workshop while I don't visit.
"Armoured Science Complex" by TheNerd: steamcommunity.com/sharedfile...
The author of the map is saying this map is his first work, so there are some unstable matters such as too bright lightings and nonintuitive structures. However this map is so good map.
This map offers you so difficult fights, because you need to fight against two or three dreadnoughts in narrow arenas. I usually prefer sneak play with small body, but in this map, I needed to give up my style.
About the second save point, there is some critical error. If you kill all enemies and activated all three deadman switches in the middle part before you get second save point, you become unable to get the second save point, so you can't clear the map.

[@jkobain]

Didn't know you can soft lock yourself if don't swim down to the left first: the barrier there somehow gets blocked. No idea why exactly Nerd decided to do so.

[@DeannaEarley]

That's exactly where I'm stuck now, and found this video. I'd already opened all doors so I wonder if that's blocking it...
Update: it was. Restarted and tried before opening that door

[@jkobain]

@@DeannaEarley this is how we met here. Both of us.