lmao you went to a museum for this? i beat that puzzle by brute forcing every combo while half asleep on a couch, no notepad needed. the "hidden patterns" thing sounds deep but really it's just a fancy way of saying the game rewards staring at stuff long enough. glad the replica made it click for you though, but weeks on that clocktower feels like a personal choice when walkthroughs existed even back then lol.

Yeah I read somewhere that walkout basements are tricky because the soil gas can come in from the side walls, not just the slab. That drop from 250 to 120 is actually pretty normal for a first fan, most guys I know say you need a second suction point on the opposite side of the house if you're still reading above 100. Also check if the crawlspace is actually sealed off from the rest of the basement, a lot of people forget that the vapor barrier needs to overlap at the walls too. We had a similar issue and adding a small fan in the sump pit on the other end finally got us to the single digits, but it cost another $400.