7 hours, turret instantiation law. Taking tomorrow off, also Combo Breaker is running.
If a gem touches a walker that is not tracking it while that gem is not currently in contact with the 3 walkers that are currently tracking it, that gem will drop one of the non-touching trackers in favor of commanding the walker it is currently touching to track it. This effect only occurs with walkers that are not already tracking an NPC. Turret spawns push actors (still including the builders) out the way of its instantiation zone to stop nasty trapping and overlapping. If a turret would spawn under a spawner it will instead select the nearest location not under the spawner and instantiate there instead. If that location is already occupied, the spawn does not occur, instead that gem is made ungrabable for 5 seconds so that it has a chance to be grabbed in space where a turret could spawn. Walkers slightly slower vs player, slightly faster vs gems.