Board Thread:General Discussion/@comment-98.25.222.202-20130713042702/@comment-24.93.232.216-20131013090410

Igneous extruders don't need anything at all to supply infinite cobblestone into a recycler, except for one starting bucket of water and another of lava. They will outpace an overclocked recycler, and don't even need pipes  if you place it directly on top of the recycler. Block breakers are more useful for people who feel like quarries make things too easy, in conjunction with a deployer to remove or place a block at will for some reason (like removing a phased conductive buildcraft  pipe to reduce power bleed with a wireless energy bridge setup). I imagine they would also make decent weapons in support frame airship dog fights if your server bans explosives.