Fantastic mod, no idea why this isn't base game.
I don't suupose there is anyway to add some kind of filter such that you can only replace certain tiles or even the absence of tiles? I know a lot of people are using the mod to paint fill large areas ahead of layering more complicated blueprints and being able to control what gets painted over would be amazing,

Sorry didn't see your comment! More likely to see Github issues.

I like where you're going - could you give me some concrete examples of the type of things you're trying to do? Feels like getting the UI right might be difficult, but definitely open to feature in this area.