[Mathias]

See how you have traitcost = 4 in your script?

How about storing that in a field whose value you can define in thing_attributes.dat and thing_traits.dat?

Add this to the traits component in traits.str:

 
<field
  id="trtCPCost
  name="CP Cost Multiplier"
  type="derived">
  </field>

replace this in your script:

 
traitcost = 4

with this:

 
traitcost = field[trtCPCost].value

and in each attribute and derived trait:

 
<fieldval field="trtCPCost" value="4"/>

but on the void one, instead set it equal to 6.