User blog comment:Feldpausch All4/Mining in Middle Earth/@comment-25565811-20141117162711/@comment-25225066-20141117163733

Thanks, apparently spellcheck is not working. I like your method, but seeing every block is not important when things come in veins. If you find part of the vein, you will get it all, and the tunnel right next to it will probably find the other side of the same vein.