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Went ahead and grinded the asscheeks off a couple of these, with mixed results. Seems like some have actual thigh swivel built in at the hip that's just blocked by sculpting, but some are just a square peg going into a square hole so you're not getting anything even after you trim off the sculpt.
So hybrid seems like a lost cause, but ragnarok now gets a little less than 90 degrees of outward swivel and it's barely noticeable with the flaps. The whole thing took a couple minutes per side.