Jitter/Sticks on Coaster Brake Hub Wheel I am having a major problem trying to get my Coaster Brake Hub reassembled properly...

I've tried with 2 separate wheels, different components and all.

Here's a video of the problem: 
                
            

I am using the exact same system as this guy in the video: 
                
            

Do you have any idea of what is STICKING, causing it to jitter like that?

I'm tried reassembling it 4 times now on 2 separate wheels with duplicate components.

I've tried different tensions - it's as if the insides might be a bit worn out or...?

Anyone have any experience on this?
I don't know if this model/brand of coaster brake has one, but what I have seen this problem with Bendix coaster brakes and the culprit is a worn retainer spring or a worn driving clutch. Read this article from Sheldon Brown: https://sheldonbrown.com/coaster-brakes.html