I have a weird issue with the Power Armour units creating visual bugs in the form of big back blobs and stripes, as well as units that show up "dismembered", as in, their body parts are floating off to the sides of the torsos.

Playset is:
OWB
OWB Support robots and more 5.0*
Darkness falls
OWB - Better ideologies
OWB - Lost Hills expanded
OWB - Definition of Insanity
OWB - San-Fran chapter
OWB - Tech Tree over haul Redux
OWB - ERX Icons Overhaul Live and Reloaded
OWB - Unit Model Overhaul Redux

If any of those mods have changes made to the tech tree, there are likely to be conflicts. Was it any power armor in particular that was affected, or was it every power armor model?

I believe it was the T51 or it's upgraded versions.
The Darkness Falls does affect the Advanced Power Armour, but it's model wasn't affected.

My three mods shouldn’t conflict or cause any such model glitches on each other, so I can only assume that one of your other sub mods is overwriting tech tree files. Im unfamiliar with pretty much all of those mods you’ve listed so I wouldn’t know off hand which one could be causing an issue.

Aight. I'll do some tests and report incompatibilities.