I figured as much. I finally got that SOB to not leak past the o-ring. I didn't want to perturb the force.

 

Alright, I just ordered mine. What should I be expecting by swapping in this wheel? The assurance that the timing I am requesting is what I am getting?

 

FYI: I have a "domed" and "flat" back CAS. I opened both and they are both Hall effect.
:( Obviously someone could have changed the cover, but just be sure to check before assuming the "flat" back CAS is an optical sensor.