You go to the Power Ups library and pull the Weapon Bond advantage onto your sheet. But the Weapon Bond advantage doesn't have any features included that will make it add +1 to your appropriate skill, even after typing in what weapon it's for.
On this sheet I've added Weapon Bond, as well as two BSA Welrods. One is named Nancy, because that's going to be the gun that Reita finds especially well suited to her. With no further changes, GCS doesn't account for Weapon Bond, and both are at skill ten.
In the past, I would have dug around the Weapon Bond Advantage trying to add a feature that would bump Pistol Skill only while using Nancy, but this leads to problems:
- The Feature "Gives a Skill Level Bonus" affects Character Skill- not effective skill using a weapon, meaning it will bump defaults, affect non-weapon bond weapons, and force you to remember to take -1 if you're using a weapon you're not bonded to.
- Separating out a specific skill via skill specializations gets messy quickly.
The Right Way:
When you open up the dialog box to edit a weapon and click on the line that allows you to edit a weapon's attack, you want to edit the line that dictates which skill is used.
And looking back at the sheet, we can see that one Welrod is showing an increased skill level, while Guns Skill is still 10, and the other Welrod isn't bumped.
This is also the correct way of modeling Reflex Sights, Bonuses from Fine/Very Fine/Balanced equipment, and can also smooth over RoF calculations when using shotguns. If it affects the weapon and not the base skill, you likely want to add the bonus to the weapon, not via a feature which increases skill.
This method breaks down when using equipment bond, things that affect Fast-Draw, etc. I'm still noodling on the best method of handling some of them.