BioHazard (First try - No preview) (DrainSim) - Going in 'blind' again

"BioHazard" is a new map that appeared just today Oct 1 6am. I did not even directly noticed it through the Workshop but I saw there was a video of it on YouTube, so I went to the Workshop, read the instructions, looked at some pictures, avoided the comment sections and I just went in 'blind', with only a fraction of information of the Workshop description. Let's just say : On this map you have to be really careful what you are doing.