So the proximity mine is usable by Infiltrator and Engineer. Infiltrator: 200 certs to unlock first level, 400 certs to unlock second level Engineer: 100 certs to unlock first level, 150 certs to unlock second level Well, I unlocked the first level on my Engie, and now when I open my Infiltrator cert chart, it shows the first level (200 certs) as "unlocked," yet I can't equip the mines on my Infiltrator. So I guess if I want to use the proximity mine on the Infiltrator, I have two options: spend 400 certs on the Infiltrator's second level of mines and hope that unlocks it for the Infiltrator, or spend 150 certs on the Engie's second level of mines and hope that unlocks it for the Infiltrator. Unfortunately, I have 0 certs right now so I won't be able to test that until I play some more. What do?