Exorcised the steering gremlin from my Demon

Thank you for your post.
This came at the perfect time because I'm facing the same thing, and was going to order a new p/s box from firm feel. (stage 2 like you did)
One question though, did you rebuild the coupler at the same time?
I'm tired of driving a car that ''hunts'' all of the time like it had bias ply tires on it...