It has been done. Usually the area to repair is too thin for rods. I try to make sure all oil is removed from the head so glue will hold. Fiber rods need perfect alignment in order to make the repair well done. Replacing wood in that area, I prefer to make the new piece part of the entire head. that way part of it abutts a larger section of the receiver when possible.

Dennis Earl Smith/Benefactor Life NRA, ACGG Professional member