I was riding buy a ROK base on the army bus and they had a ROK soldier out there chained to a post and he the chain was set up so he could not sit nor stand, he was in a hunched over position. I have no ideal how long he was there. They didn't screw around.
When I was in Nam I heard about the ROK but was never in action with them. Was in action with the 5th ARVN Rangers who seemed to be fairly competent.