Hi, We have just patched the test server with a new function that I think will work nicely. You can now add tiles to an existing building, and remove tiles from an existing building. Removing tiles means you need to bash all existing adjacent walls and floors on that tile before you can remove the tile from the structure. Please test this properly as it is quite a large change to the codebase and requires alot of testing. Report your findings in this thread! Best regards Zcul