hand spinner

made a little bigger than the original to fit in two m10 nuts into the cut outs and then cover them with the plug..the weight is now hidden inside the spinner

1.print the spinner

2.press fit the m10 nuts into the cut outs take care when doing this so as not to split the casing.I used my drill press to press the nuts slowly into place

3.glue the plugs into place on top of the nuts

4.sand smooth

5,add centre bearing and enjoy