These drawbacks can be mitigated by 10% per level of the appropriate skills in game
Rig Drawbacks: Most rigs come with a built-in drawback to balance them out. The drawback depends entirely on what class of rig it is. These drawbacks can be mitigated by 10% WOW Gold per level of the appropriate skills (Shield Rigging skill for shield rigs, for example).
Additionally, some types of rig have no drawbacks. The skill to train in order to reduce the drawbacks is the same skill required to use the rig and it shares its name with the rig type itself.
Hint: This specifically refers to the power-grid/CPU used by that type of weapon. For example, energy weapon rigs will increase the power-grid requirements of lasers.
Skills for Life: The Salvaging skill is rumored to increase the number of components found and decrease the frequency with which a wreck will yield nothing and return the message that there was nothing to salvage.
However, that is not the case, which should hopefully put an end once and for all to this heated debate.
The Salvaging skill only affects the chance of successfully salvaging a wreck per cycle of your Salvager I module. It does not affect the chance of getting no components from a wreck or the quantity of the components that you can retrieve.