My first attempt at designing and making a turkish spindle from scratch. I prefer Turkish spindles because anything that reduces any work I have to do is awesome. Because I am lazy. Designed the silhouette in CorelDRAW and extruded it in Tinkercad and designed the stick. You're welcome to print the stick provided or use a dowel. I would recommend printing the stick slowly. I may design a smaller printer friendly version of the stick in the future for other people who, like me, don't have interest in hunting down a dowel.
.1 or .2 should work fine too
Depends on how heavy you want it.