This is kinda a weird question (and I'm honestly not sure if its in the correct catagory so feel free to point that out).
Is there anything mechanical that gives additional benefits to narrowing your craft. For example, I can take "Craft(Weapons)" and be able to craft any weapon I want.
But say I want to be the very best at making sword, swords are my thing and nothing else. If I take "Craft(Swords)" is there anything from any of the books that gives named bonuses for this kind of choice?
As a GM if my players do this (taking a more specific craft over an already existing broad one) I tend to give them the Toilcrafter character trait for free if they do this (even if they are not a Dwarf), but is there anything else that has already been named as something to give such players?
Can't think of anything.
Me, if a player asked for this, I'd give them a +2 circumstance bonus for crafting swords and a -2 circumstance penalty for crafting other weapons. I would double that modifier once you have 10 ranks (to be consistent with other feat-related modifier bonuses).