The set screws were not very tight, and pulley slid on shaft, which put belt at angle, and it rubbed against pulley, which tore into it. Took me awhile to find that small of an allen wrench in my toolbox drawer.
I was able to use a dental tool to scrape the rubber crud out between teeth and can almost see metal, so it will work for now, but definitely need new belt. Don’t think I need pulley, but might as well if ordering belt. Saw that it was like $3 on cloudray.
I did notice the Stepper was very hot, but not sure if that’s normal.