Thought I'd post these pictures here to give a clear idea of what the wire looks like.
Next to some Knu KCA 1/0
Not completely sure if it's true OFC, I wouldn't be able to tell/test it. IIRC, I read somewhere on here that true OFC is silver.
So far, the only issue that bothers me is the jacket thickness. Seems to be uneven in some places, though it might be that one specific spot i stripped. Once I get my fuses in, I'll redo my big 3 and let you all know about the flexibility.