Called Shots and Attack Weak Point

[Lindharin]

Hi,

How do Called Shots and Attack Weak Point interact? Do they stack, and if so, then how?

Here's an example:

Target has a defense roll of 10. Attacker has Attack Weak Point, and wants to make a called shot.

If the attacker rolls a 19 or less, it misses because of the called shot.

If the attacker rolls a 20 to 29, it is a called shot and does +10 damage.

If the attacker rolls a 30-39, what happens? It is 20 over the target's original defense, but it is not yet 20 over the called shot requirement of 20. Does Attack Weak Spot kick in and the damage gets doubled? Does the +10 from called shot get included too, and if so , is it before or after doubling?

If the attacker rolls 40+, it is 20 or more over even the called shot requirement, so Attack Weak Point should definitely apply. I still need to figure out how the called shot damage bonus interacts with the doubling (if at all).

Thanks!

[Lindharin]

Also, how does Attack Weak Point work with objects or stationary things like force fields that are put around a target? Do objects / stationary force fields get any defense, or do they count as defense 0? Do you do double damage to objects / stationary force fields if your attack roll is 20 or more?