Thanks! Which fragment was the last one for you? Would be useful to know so we know which puzzle(s) need more hints!
river, basically didnt notice the valve for a long time
Ah yes, thanks - at one point we had the sewage extend onto the screen with the valve, so putting that back may help, or we may add back in a rusted version of the valve in the dark world as that may help draw attention to it also!
