ORAC Lathe Spindle Stepper Pulley

As I'm upgrading [my ORAC lathe](http://www.wolfteck.com/orac/), one function I want to play around with is precision spindle control. This timing pulley fits on the [stepper](https://www.amazon.com/gp/product/B00PNEPI0A/ref=as_li_ss_tl?ie=UTF8&psc=1&linkCode=sl1&tag=wolfteck-20&linkId=273dd46eefbe804989f8d7b9e8fb3ec4), which is mounted inside the headstock with my [ORAC Spindle Stepper Mount](https://www.thingiverse.com/thing:2813938). This pulley connects to the [spindle pulley](https://www.