TB III is a great glue, best for bonding wood to wood. Have used it in other applications with success, like with fabrics, leather and paper. An extreme example, I use TB III to glue feathers on both aluminum and carbon arrow shafts. Works just fine applied to really clean shafts, a bead on the quill with a syringe and a bit of patience with the dry time. Fletches stay put. Anyway, while TB might work in all wood limbs, I wouldn’t try it for bonding wood and fiberglass for use in limbs. Yeah, stick with epoxy for limb layup.