I'm expanding my 1 chunk house to a 4 chunks house.
I need to excavate an 3 chunk hole for my 3 floors basement (4 chunks total less 1 chunk already built).
My first thought was using a filler from BuildCraft, but that is prohibited in the overworld on the server I'm playing. Same for turtles and the BuildCraft and Extra Utilities Quarrys.
I can use a Tinker's Construct hammer and excavator but that would be slow.
So, how can I clean the area quickly for I build the basement?