and you have no issues with mobs or silver fish. Interesting. I've been digging a large quarry thinking, if only I had a turtle. Using the dirt and cobblestone to expand my floating base. Good thing invaders can't fly.
Silverfish are a now and then thing, i try to avoid an area after i hit them, back up right turn, go around. Mobs are minor if you light your tunnels, and don't go running off down caves. If i hit a cave, i'm careful, wall off one end, light up the other then mine, and can then worry about the other end if i hear no mobs. Wall off cave from mine tunnels,keep going. Put down a chest and fill with ores when i get some, in case i die. BnB makes me careful and paranoid.