Any loot generated trinket can have up to 1 Major, 1 Moderate, and 1 Minor gearcraft imbues. (Note: The trinket must be a magical trinket, with spells on it. Non-magical trinkets cannot be imbued.) Attempt an imbue by first adding a full bag of salvage twice (one bag total) to an armature for the level of effect you wish to add. Majors max at 33% success rate (38% with the Charmed Smith augmentation). Moderates and minors can max at 100% with high enough skill/low work item/high work salvage. Adding a major: Adding a moderate: Adding a Minor: