I'm trying to make a starbase module, and so this question is limited in scope to modding starbases (though the answers may apply more broadly).

1) Is it possible to set rather than add to a value?

For example, say I wanted to set the range of a ship in the starbase's area of effect to a specific number. Let's say a ShipRange value of 100.

If you say

  <BonusType>Flat</BonusType>

   <Value>100</Value>

That would add 100 to whatever the ship already has...

Is there some <BonusType> or <ValueType> that allows us to make the ship's ShipRange value equal to 100?

2) Is it possible to reduce a starbase's area of effect without changing the Basic Starbase (StarbaseDefs.xml) range?

For example, say I want a module to have an area of effect of only 1. It seems that you can't simply use a negative number to modify the range:

   <Value>-4</Value>

Is there some way to achieve this. Again, I don't want to reduce the range of all starbases--or have to change each starbase ring to have a bonus to its range...

Any help will be greatly appreciated!