VATS Matrix Overlay (Fallout 4)

Description
VATS Matrix Overlay is a mod available for most (?) power armor helmets. It requires Science! rank 2 to construct.

Effect
The upgrade description reads "Increases VATS hit chance." It increases VATS hit chance by roughly 9-10%. (Tested on a stationary turret over multiple distances, compared against without the upgrade).

Alternative upgrades
The 'Sensor Array' upgrade "Increases Perception" by 2 points. This results in a very similar VATS hit chance when compared to the VATS Matrix Overlay (only 1-2% less chance at the same distance). This upgrade requires the Science! rank 3 perk to construct. The potential benefit of using Sensor Array compared to VATS Matrix Overlay is the carry-over to stealing and lockpicking attempts, and any other benefits of an increased perception stat. (Tested on a stationary turret over multiple distances, comparing VATS hit chance with VATS Matrix Overlay and Sensor Array).
 * Perception also determines the distance at which enemies appear as red blips on your HUD. Despite what Bethesda's own video states, Perception does not appear to factor into stealing chances; that would be determined by Agility and possibly Luck. Further testing is required.