Just came in from the garage.
The news is ... not what I hoped.
No sign of the torsion spring. And, I was not able to move the doohickey to the left or right. Maybe it's jammed?
Keep in mind I have only removed the outer case so far. I used a lot of light and a magnifying glass to try to peek behind the rotor.
I'll order the torsion spring from Eagle Mike tomorrow.
Anyone have a set of the rotor tools you're willing to sell or rent? Otherwise I'll order those too.