Can you double up on the effects of cell items. Like.. um..

Self-Defense Books

DEF: +5%

NRV: +1%

Does that mean that if I place 2 of these in my cell it would be +10% Defense, and +2% Nerve? Just wondering before I make the investment.

Yes, but it's done on the base amount.

So if you have 100 defense, it goes:

100 + 5% of 100  = 105

105 + 5% of 100 = 110;

and NOT

100 + 5% of 100  = 105

105 + 5% of 105 = 110.5;

So the % adding always goes on your base stat and not the previously altered stat of another amenity

Otayies. Thats what I wanted to know. Thanks Very helpful.