I used a pair of diagonal wire strippers to cut the Carbon Fiber rod, it reduced the chances of splitting the ends. Just cut it to the same length (1-9/16") as the original steel shaft. Once the shaft is cut, install the drive gear at the same position that it had on the steel shaft (about 1/2" from the bottom end of the shaft). Use a little CA glue to hold it in position. You may have to "build up" the shaft slight with a little of the CA glue before installing the gear. I put a thin coating of glue on the shaft, where the gear would be placed, allowed it to dry and then pressed the gear onto the shaft.