A long time ago I used to do tips by hand. First you need to get the old tip off and sand or file the end perfectly flat. Glue the tip on, then turn the shaft upside down and trim the overhanging tip with a new razor blade...going up and down trimming a little at a time until it was close to good.
Then...................................
I got myself and old motor, put a new cord on it...got a drill chuck and attached the drill chuck to the motor. Adjust it to get it to run true. Put a 5/16-18 bolt in the chuck for my Meucci shafts. Then screw the shaft on the bolt. Turn it on and sand, shape and burnish. Make sure you always have at least one hand holding the shaft lightly while it spins.
This was a long time ago before layered tips came out. My tip job was usually good. With this set up I'd refinish shafts too.