Thank you Krish again for the feedback.
I was actually refering to the blendshape that i showed in the last few seconds of the video. Where my Zbone is actually translating to where the alembic file is. In the video where Andy shows how the driver works, the zbone doesnt translate.
I did see the pre roll, i m afraid when i try to do that the zsolver node did not move because of my pivot point most likely.
I tried to move my alembic file to match my zbones position manually. I think it is a very close match. But there is a slight jump down in the alembic at frame 2.
Also, I set my max iteration in zsolver to 2 from 10. What does it exactly do ?
I ran a small test with just 100 frames to see if i am at the right point.
Thank you once again. You are very helpful.
Updated full length video