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Diversified Investments
Complete the following construction projects in Mechagon.
Diversified Investments requires you to complete five construction projects in Mechagon, rewarding the Redundant Reclamation Rig decor item upon finishing all of them.
Build the Flame Turret
Contribute 
100 Spare Parts to the Flame Turret construction project. This is the least expensive of the five projects and can realistically be completed by a single player.
Build the Rustbolt Armory
Contribute 200 Spare Parts and 1 
Energy Cell to the Rustbolt Armory construction project to receive credit toward the achievement.
Build the Drill Rig
Contribute 500 Spare Parts and 2 Energy Cells to the Drill Rig construction project at 53.52, 32.92 in Mechagon. You must contribute materials and remain present until the project is completed to receive credit.
Build the Charging Station
Contribute 750 Spare Parts and 3 Energy Cells to the Charging Station. There is only one Charging Station in Mechagon, but you can force it to respawn quickly: use the active Charging Station to charge your cells until Troggs attack you, then use a combat-drop ability such as Shadowmeld, Feign Death, or Vanish. The Troggs will then attack and destroy the Charging Station instead of you, causing it to respawn in approximately 8 minutes so you can contribute and claim credit.
Build the Reclamation Rig
Contribute 3000 Spare Parts and 5 Energy Cells to the Reclamation Rig construction project. This is the most resource-intensive project and has a long respawn time, so be prepared to wait for it to become available. Contributing at least 1 Energy Cell and staying until completion is sufficient to receive credit.
Tips
You do not need to personally contribute the full material cost for each project — contributing a partial amount such as 250 Spare Parts and 1 Energy Cell for the Charging Station is enough to receive credit as long as you remain until the project finishes.
The Charging Station respawns approximately 8 minutes after being destroyed, making it the faster of the two limited-spawn projects to farm compared to the Reclamation Rig.