Treadmill spanner for Mill

As many others have, I have converted my mini mill to a use treadmill motor. The larger motor has more torque at low speed and should (when the controller is replaced) reach a higher top speed. I only did this conversion when the original motor started to fail.

The method I used for this conversion replaced the pully that had provided a spot for a tommy bar spindle lock, so I created this wrench to hold the spindle when changing collets/chucks and when tightening the spindle nut.
The spanner