Feat Legality and Requirements question: Gate Breaker

I've been trying to figure out the legality of taking the Gate Breaker and Relic Breaker feats after reading through the Path of the Hellknight book. Directly from the book, it seems like you have to be a Hellknight to take the feats, does PFS remove that condition?

On another note, does Gate Breaker's description mean that you get to stack your Strength bonus twice when sundering?

No you don't need to be a Hellknight to take that option. Also, yes they campaign clarified the feat to explain that yes it does stack your strength twice.

No you don't need to be a Hellknight to take that option. Also, yes they campaign clarified the feat to explain that yes it does stack your strength twice.

Awesome. So awesome. I'm excited to make my silly unarmed weaponbreaking "Tools are weak, if you can't kill something with your FISTS, you're not a real man!" female brawler.

Another question. For the Steel-Breaker archetype's "Exploit Weakness" ability, it says:

At 5th level, as a swift action a steel-breaker can observe a creature or object to find its weak point by succeeding at a Wisdom check, adding her brawler level against a DC of 10 + the object’s hardness or the target’s CR. If it succeeds, the steel-breaker gains a +2 bonus on attack rolls until the end of her turn, and any attacks she makes until the end of her turn ignore the creature or object’s DR or hardness.

Does the "OR" mean you have to choose, or does it do both? I can't find an FAQ or errata for it.

Another question. For the Steel-Breaker archetype's "Exploit Weakness" ability, it says:

Exploit Weakness wrote:

At 5th level, as a swift action a steel-breaker can observe a creature or object to find its weak point by succeeding at a Wisdom check, adding her brawler level against a DC of 10 + the object’s hardness or the target’s CR. If it succeeds, the steel-breaker gains a +2 bonus on attack rolls until the end of her turn, and any attacks she makes until the end of her turn ignore the creature or object’s DR or hardness.

Does the "OR" mean you have to choose, or does it do both? I can't find an FAQ or errata for it.

I don't think there are any creatures that have both hardness and damage reduction?

The intent seems to be that you get to whack it with full physical damage if it has any of those defensive abilities, not to force you to choose to gamble on whether a creature has hardness or damage reduction.

I originally was asking for the sake of Sundering objects, but then just a few minutes ago realized that objects won't have DR, just Hardness. It's been a long day. Thanks though.