Board Thread:Questions and Answers/@comment-174.52.77.146-20181228214332/@comment-134.101.43.161-20200610082501

Just deconstruct the silo with the welding gun (default right mouse button) and build a new one. The drain is to low and you don't want to buy expansive blueprints just for a 10% increase of a single digit number (OS Uplink unfotunately also puts a "please shot me" mark on the map).

You can also farm after a lockdown with the cortium drain upgrades equipped on ant (cloak, shield, speed boost), but it will be slower because you can't buy new silos (though you can still place them after the construction kill wave, it only happens once).