You can select an available mod/item, then press 'E' and quickly move the mouse to select another mod at the same time. When you want to modify/make a weapon/armor/item but you don't have the perk.Robotics Expert: When using a scope, in first person, the activation range of this perk is as far as the player can see.Pain Train: Will stop working completely after a while.3 Menu, HUD, and Inventory related bugs.2 Crashing, freezing, and other hardware- or software-related issues.