Trencher Drill Mk3
These massive multi-block drilling machines can be used to harvest all known materials in a very rapid fashion. To build one, you'll need to build the drillhead in a 3x3x3 layout, then the motor in a 3x3x3 fashion, touching it. The Trencher's facing is dictated by this; the motor always goes at the back. You can use this to make Trencher face any angle, including straight up!
Be aware that these new drills are very power-hungry, and can drop off hundreds of ore per minute. You'll need to think big when it comes to moving this stuff up to the Cold Caverns for smelting - Cargo Lifts and Minecarts are the order of the day!
The currently fitted drills are able to harvest ores without even the slightest bit of loss!