Question about capture planet strategy

[Q]

As nobody seemed to know an answer, I did some testing:
Damage to planets is randomly distributed between all types of cargo, facilities and population. Therefore there is no strategy possible that will selectivly destroy weapon platforms (or any other cargo). Using tachyon projector that only damage weapons does not work either, even if you mod them to penetrate shields and armor: they do no damage at all to the cargo units.
But you can create a new damage type with "normal damage type" and the two lines:
Facility Damage Percent := 0
Population Amount Killed Per Damage Point := 0
Such a weapon will indeed only destroy all cargo of a planet and will not harm population or facilities.

If you want some "collateral damage" you could use something like:
Facility Damage Percent := 5
Population Amount Killed Per Damage Point := 0.01
Such a weapon would do a small damage to population and facilities but still mainly destroy the cargo (you would have to test the ideal numbers to find the amount of collateral damage you want).