Intended Change

C-D1 drone:
Make the rebuild cost of the drone half of the upgrade cost.

Mass cost: 160->60
Energy cost: 1600->800
Time cost: 100->200

Reasoning

The upgrade is made in 40 seconds at 3 m/s drain. Rebuilding is done in 10 seconds at 16 m/s drain. That's inconsistent and counter-intuitive for a unit that isn't even present in the client unit database. Rebuilding also costs 1600 energy versus 2400 for an upgrade. A sudden unexpected E-drain spike of 160e/s can ruin a player's eco-balance. No one would reasonably expect the rebuild to drain 2.66x more than the upgrade.

It costs 120 mass to build a drone. It also costs 160 mass to rebuild a drone. This is the only unit in the game that is more expensive to rebuild than build. This was an accidental leftover when the upgrade cost was changed but the cost of rebuilding the drone wasn't adjusted alongside it.

Expected behavior

The rebuilding costs of both left and right drones are correctly adjusted in the script file.