Gravysuit upgrade

To start this quest, speak to Vasily while wearing the Grav-suit. He tells you about a potential upgrade for it. You will need to find the blueprints for the upgrade; they are stored somewhere in X-14 Laboratory underneath Kurchatov-37.
== Walkthrough ==
=== Kurchatov-37 ===
Once you obtained the transition to the X-14 by accepting Vernitsky's report, travel to the [ postal office] at the south of Kurchatov-37. On top of the office building, there will be a turret (visible from essentially every point of the city), and a dozen mercenaries will guard the entrance. Attacking the office from the western side (instead of straight from the north) seems to be easier.
Get rid of the mercenaries and descend into X-14.
=== X-14 ===
The blueprints will be in a half-open drawer in the lab offices themselves. (as opposed to subway tunnels)
Take the blueprints and all of the required materials to Vasily, and return to pick up the suit to close the quest.
=== Back to Vasily ===
To upgrade the suit, you'll need:
* the Grav-suit itself;
* the blueprint you obtained;
* 6 Feather artifacts;
* Shell;
* 50000RU as a payment for the work.
Feather artifacts can be found in the following quests:
* In the guise of the beast
* Laseraims
* Shoulder to shoulder
* A friend's gift
* The monsters' parts (Artifact Klondike)
* Just reward (Voronin's documents finale)
* Kuznetsov's stash (available after Kuznetsov's deck and "Baileys")
* Deacon's chain quest.
* random stash in Limansk that belongs to Ghost (recurrent source but the chance is truly minuscule, don't count on it!)
Gather all required materials and bring them to Vasily. Return after 24 hours for the Modified Grav-suit.
== Notes ==
* The upgrade is notable for cutting the battery usage to nearly zero, making it the most energy-efficient suit and a great choice if you need to run long distances or do repeated jumps for puzzles.
== Bugs ==