Need help diagnosing brake knocking noise (1 Viewer)

[M3GX]

I recently changed rotors, shoes, and calipers all around on the GX. The Rear drivers side rotor was seized and took a hell of an effort to get it off, to the point that drum shoe hardware got messed up. So I replaced the drum shoes and hardware on that side also. At first it was making an awful noise because the dust cover lip of the drum hardware was scraping against the rotors where it slots in. I fixed that (cut it away), but it's still making this knocking noise. The noise isn't there when I start driving, but does become audible after a few minutes/miles. More info on my build thread linked here Video of knocking noise is below

Any ideas??

 

[M3GX]

Update:

The drum brake pad adjuster only needed to be adjusted some more, to move the pads out a bit further. There's a pretty fine line between not enough, and too much. Too much and you can't pull the rotor back off easily. Too little and I get the knocking noise.