I'm working to improve my fletching skill. I just finished hooked bone combat arrows (hooked head, bone shaft, wood vanes, large nock), which maxed at skill 141. I thought that ceramic arrows were next (field head, ceramic shaft, round fletch, large nock) until skill 152, but I get a message letting me know that the arrow is beyond my skill. Does anyone know what arrow I should make next to improve fletching?