×4N2E - I did get the lynchpin, but I didn't get why there would be a major problem even if there were more mirrors.Because if there were enough mirrors to put stepping stones under all the babies in the positions they were "
naturally"
in when you hit the token, Beethro would get killed as he exited the corridor by the baby that would have been at the southwest.
3N4E - I thought the checkpoints in the western chamber are actually very helpful! I solved it by cutting the mud using the mimics only on the four corners. How did you solve the room, then?
I made four cuts too, but all in the NW quadrant.
3N2E - I did use the turnaround to avoid stepping on the switcher tokens. I solved this room by making a "wall" of tar babies. Again, how did you solve this room?
My baby wall was in the strip of flooring in the centre of the shallow water. I just had to do a little pacing while I was on that strip to make sure my line was long enough and then make sure to hit the tokens twice.