Dont know if this should be an erratta or not, but in R&G for cost it says x2.
now does that mean that beings as the armor has to be made with the stuff, and therefore it can only be added at armor purchase, that it doubles the cost of the armor? EX 13,500 x 2 = 27,000
or as Chummer5 wants you to believe as you add it to your armor, that its cost is an ADDITIONAL x2 to the base cost of your armor. EX 13,500 + (13,500 x 2) = 40,500
i dont believe that the 2nd example is correct. But just asking for clarification