This mod gives your mining tools a 4-block diameter instead of 3-block diameter. This makes it much easier to dig forwards, which makes the game a more enjoyable experience. I've now added an option to choose between 3 mods; one that gives all your digging equipment a 4-block diameter, one that makes just your drills have a 4-block diameter, and one that makes just your pickaxes have a 4-block diameter.

The installation on the previous version was flawed, but it's all fixed now. Just place one of the three folders in your mods folder, and enjoy smooth digging.