Rewinder for Thermal Paper

i needed a small tool for unwinding bigger thermal paper rolls on to a smaller one as my printer only allows rather small diameters. i created this in a hurry, so any improvement from you is welcome :) (maybe a combination with a small knive to cut broad rolls for use in a gameboy printer...)

in the design i've included an axle for the new roll. it a has a small slot into which you can insert the paper. this way, it won't slip while you are winding up to the smaller paper roll