I marked around the shaft about 4 or 5 cm from the thick end of the chopstick. I then whittled away the chopstick corners along the length of the stick, stopping at the mark at the thick end of the stick.
See the square edge on the left, the unchanged chopstick? I lightly sanded along the stick to make it smooth & get rid of potential splinters & anything that could snag fibre.
I've been experimenting with notches on some spindles, cut into the stick about 2cm from the thin end of the stick - and sanded.
Then came the really fun part; playing with fimo. In theory, you want a balanced whorl, that will have an even weight distribution while spinning. I made a few different shapes in the fimo clay; experimenting with thickness, circumference and weight distribution. I pierced the centre of the whorls with the spindle shafts to try get a perfect fit.
After oven-baking I fitted the whorls onto the chopsticks, slipping them on to the sticks from the thinner end of the stick.
So, a test-run. (please excuse the dirt under my nails - it's fimo clay) To spin a bottom-whorl spindle, attach the leader just over the whorl, on the long portion of the shaft (to the left here) - wrap it over the whorl, around the shaft, and back over the whorl.
Attach the leader at the top of the shaft (narrow end) using a half-hitch...
... and spin.
I find it difficult to spin bottom whorl spindles - I cannot get as much momentum spinning with a spindle in this position.
I realised I could easily make a top-whorl spindle by cutting a notch into the thick (short) end of the spindle shaft.
It started to get dark at this point so the photos are not great, apologies.
I intend to test-spin all spindles over the coming days to see how the whorl shape affects my spinning. I'm also wracking my brains to think of other useful objects I could make from fimo clay. A new addiction, perhaps.