Speed sensor out!!!!
 

After a three day soak of PB Blaster and an extra ulcer from the thought of having to do some major surgery, the speed sensor came out! It went from being completely seized to practically falling out. The reference sensor came out with absolutely no issue at all. The trick I used was a 10" adjustable on the sensor, and a small adjustable close to the end of the handle to turn it with.

Congrats!
I had the same exact drama last Summer.
You think there would be a tool you could put under the top and slowly cork screw out with a turning knob. Ol well, at least it felt like a glorious moment when it came out ;)

It was, unfortunely it did not fix my issue. But at least I was able to overcome a stuck sensor.

What problem(s) are you having?