You can do something similar to what WestTnMan suggests. After taping the shafts with masking tape and markeing where you want to cut on the tape, use a fine tooth hack saw and a mitre box for a square cut. When finished, remove the tape and ever so slightly chamfer the inside edge of the shaft with fine sandpaper. Can also stand the shaft vertically and stroke it one or two very light strokes on a piece of sand paper on a flat surface to smooth the end of the shaft, but usually doesn't need it. Good luck.