Can Gnome Master Tinker be used to meet prerequisites?

[havok101]

I have a question about the Gnome Alternate Racial Trait (Advanced Race Guide) "Master Tinker: Blah blah blah. They are treated as proficient with any weapon they have personally crafted. Blah blah blah." (http://paizo.com/pathfinderRPG/prd/advancedRaceGuide/coreRaces/gnomes.html )

If I understand the rules correctly, this should allow you to qualify for feats that require proficiency in a weapon, but you will only be able to use such feats with appropriate weapons that you have crafted yourself (unless you eventually pick up the proficiency elsewhere).

Am I correct in my understanding or not?

Edit: examples of such feats would be weapon focus, rapid reload, or siege engineer (ultimate combat)

An Example of what I am talking about would be: You, Bob, have this trait, craft a rapier, and take weapon focus rapier. Your weapon focus feat works just fine, but only with the one rapier you made yourself. But when you pick up your friend Tom's rapier, your weapon focus feat doesn't help you at all.

[Arachnofiend]

IIRC, this came up with the Heirloom Weapon trait and the answer was no.

[havok101]

I only saw two threads concerning heirloom weapon trait. One was asking about an exotic weapon and they were told no because it got errata'd to only give martial proficiency, so that didn't answer this. The other was just clarifying that you are only proficient with that weapon and didn't mention qualifying for other feats at all. So I wouldn't say this is answered by those threads.

[Talonhawke]

Warning the following information is a Talonhawke ruling only applicable to games run by Talonhawke. Any information found within pertains only to how I would rule at my table your experience with other GMs may vary.

I would allow it but of course with the understanding that it only functions if your proficient. So if your using a long sword you made your good if you disarm a bandit of his no dice.

That being said i can see how a GM would rule the other way as the prerequisites assume you have prof. with all long swords.