I got an issue... I'm playing a survival (single, vanilla) scenario starting on Earthlike. I decided to attempt to build a Tunnel Building Machine (steam workshop- not mine) and cut through the mountain where my pod landed. This mountain is @ 8km in diameter, so this challenge is daunting at the least. After the first 3.5km, I ran out of max grid size. I ended the grid, made a new tunnel-merged with the original tunnel, and started again. Now, I am an additional @2km in, and everything is grinding to a halt. I am down to 5 FPS, drills will not cut the stone, rotors wont work, pistons wont push, etc... I even tried to voxel-hand a tunnel, but the 5 FPS is even making that impossible. I don't understand this complete collapse of world physics. I really want to cut and lay this tunnel (lake on the other side) for both gameplay and practical reasons. I am frustrated and disappointed. I don't understand how people can make space elevators and deep-drills when I can't make a 8km tunnel. The TBM lays @80 blocks every 10m, I like the practicality and style of this tunnel, and want to complete this project. I welcome any suggestions on getting this tunnel built Please and Thank You.