Maybe it is not just not clear from what you wrote, but what ever happened to swimming new cave passage first and then scootering? You know, learning the cave as you go. The 2 landmarks you asked about are around ~p1600' and yet you turned at p3200'? Then you did the same thing in HITW too?
Your takeaway on scootering HITW was wrong, it's not that low flow silty caves don't like scooters, it is that high flow, non-silty caves hide poor technique.
Nice pictures, but slow down and enjoy the caves a bit. They aren't going anywhere.