I also had some trouble getting NWS HI to work smoothly at first, I'd add that it's also very helpful to have rudder pedals as you can ease your nosewheel into the turn rather than going full deflection. By "stuck in a turn" I think bbrz meant the aircraft just stopping, not somehow getting stuck in a constant turn. When I try to do a NWS HI turn, I make sure I'm going only a few knots, ease into the turn (you could also try switching to HI mode after turning a little bit with normal nosewheel control) , and then increase power a bit so that the aircraft is able to make its way through the turn without stopping (getting stuck). Hope this helps, I'm not just trying to pile on to this argument here.