Removed control plate and speed governor. Suggest you measure how far the governor pushes back on to armature shaft. I didn't think about it and had to reset as I couldn't set the proper speed. Remember, it is a force fit for the last few millimeters.
Installed new speed control plate and set the slow rpm on stir ~60 and setting 6 speed ~180. The low setting was intermittent. Observed the contact points were not flush and with a small screw driver, had to move the stationary contact up slightly to make it fully flush. Rechecked and works!
Really appreciate the You Tube instruction video. Thanks much