Endurance all have a Fortitude trapping that indicates how many stress boxes the character has on the appropriate track, i.e.
Mental Fortitude that affects the
Mental Stress track.
YW147 the rules discuss mortal stunts, and one of the ways to create one is Adding New Trappings to an existing skill, which can refer to a new trapping, or a transplanted trapping from another skill.
If a character's concept would indicate that they have the ability to fend off stress, but not through the applicable skill, would it be appropriate to transfer that trapping to the other skill, and what would that do to the stress track?