Hi, huge thanks for the mod, it's really nice to have such a tactile way to deal with this issue!
One issue I'd like to be able to address using this mod is changing the type of water on a given tile. As we all know, Alien Biomes adds Shallow Water which can allow Biters annoying little side ways into your base, and I'd love to have a way to dig up that shallow water and turn it into deep water. (Especially in places I thought I was already protected).
Not really sure how the mod works under the hood but a suggestion for a way to make that work is to either allow landfill to be mined (and mined landfill replaces whatever water was filled in with the "dug" state) or to just allow us to directly dig up water tiles themselves, so that neighbouring, different water can flow in. Not sure if there's some situations that might allow you ways to sneakily expand growable biomes on Gleba doing this but also... irrigation is a cornerstone of farming?