The Resonance drill is upgraded today by casting drill bits in a Bit mold, which doesn't make sense for a drill that shatters rock with pulses. Redesign how upgrades work as a whole. Earlier ideas from the design notes: an amplifier, a tuning fork and harmonics for the drill, a Grav pick tool and mining charges.
Subtasks
Decide what the drill's upgrades are (power, reach, width, tuning, harder rock) and how each is earned or built, replacing the Bit mold
Decide whether other upgrades (the bag/tank, Flask, thermal lens) follow the same system