The Dark Depository research rules say that it's only possible to reduce its kp below certain thresholds by researching in different sections. Does this mean that it takes at least four rolls (probably four days) to fully research the library, no matter what? Or should hitting a threshold early mean they still have time? And if they clear the whole place before doing any researching, can they clear it in a single check (presuming really good rolls)?
Related: I have six PCs, and they've been forming two teams of three for research - one primary and two assistants. I've been letting them add their progress from these two "attacks", but that's led to them doing 15~20 points per research period, which feels fast to me. Is this about the intended speed, or are we doing it wrong?