will this work if added into an already active playthrough?

I've removed that faction now as I'm not using it anymore in the current version anyway. Everything is part of SMART now for how I control progression.

A little note: This mod is not compatible with MES Scavenger Hunt, they both use the same faction tag SCAV which causes creating a new game with the mods, or loading a game after adding both mods, to fail.

2023-05-13 05:02:50.693 - Thread: 1 -> Faction with tag SCAV is already registered in the definition manager. Overwriting...
2023-05-13 05:02:50.727 - Thread: 1 -> Error: Error during loading session:System.ArgumentException: An item with the same key has already been added.

I'd assume it would work with the voxel removal as that's done as part of when MES spawns the grid while the block removal is handled via RAI after the grid has spawned.

I haven't heard of that. I'll have to look into it. I also wanted to use windows to seal up a grid, but then have them go away once it spawns. I wonder if voxel removal still works doing this.

I use the RazeBlocks action to remove the remote after the grid spawns.
So the prefab still has the remote that gets swapped out with the RAI version and then removed as part of the trigger that sends out the ping message.

Your change note mentions removing the remote. Is there a way to make sure grids are aligned with the ground without the remote or does it just not matter for your style of grids? I've been wondering if there's a way to do without that block for MES.