[karajorma]

You're welcome Bigchunk. Most people never notice the difference between the two options anyway since they are the same in many cases. It was just a case of something that annoyed coder getting fixed as soon as a coder affected notice the bad behaviour. The fact that it made FRED much more powerful was just a side benefit.

[LordPomposity]

Could you do both guardian and hits-left invul? That way you get the effect without worrying about beams.

Yes, you could, and that may in fact be the best way to do it. There's still something to be said for making the weapons subsystem destructible, though. Consider the WiH mission "Aristeia", where the default strategy should you lose the

Spoiler:

AWACS is to order Beta wing, consisting of two interceptors, to charge through a substantial fighter screen to stage a frontal assault on a Hecate. Since Beta wing is invulnerable, this works much better than you might expect.