Class Mod (Borderlands)

''Information about Class Mods such as, if they actually give +2 to a skill you have 5/5 already in. Can anybody confirm/deny this?''

Class Mods are a major item in Borderlands, obtained at around level 20, Class Mods are class specific upgrades that amplify damage you do, heals you and your team, etc.

=Where= Class mods can be bought at Health Stations, found in chests, skag piles, garbage piles or are dropped by enemies. They boost certain things by a percentage an add ranks to exsisting skills.

=Class Specific= Here is where the different type of class mods available and what their collective stats should be in a format like:

Main Stat  to  Skill Modifiers  to 

Soldier's
The Soldier can have class mods that:

Leader
+18% - +?% Team Extra Experience

Berserker's
The Berserker can have class mods that:

Warmonger
+18% - +?% Team Damage

Berserker
+60% - +?% Melee Damage

Centurion
These are the max I have found so far, add to this if you have seen higher or lower! +48% - +?% Team Maximum Health +0 - +3 Safeguard +0 - +2 Hardened +0 - +2 Die Hard