So what exactly is this "concrete backfiller" from Gregtech? Evidently it's a significant enough multiblock to have both an ordinary version and an advanced version, but I can't find any documentation on what exactly it does. Does anybody know?
Based on my read, it looks like it basically goes to the bedrock, and starts filling in a 16-radius area with concrete with the MV version, EV version does 64-128. Has to be fed liquid concrete. After each layer is done, it moves up and does another.