Certainly you can NLP other variations of the lifts. Note they now make loadable dumbbells, so you can NLP those as well. I find it interesting that pull-ups are ok, but OHP and BP are no good. The grips are similar. Any idea what that is? How many variations of grip (narrower to wider) and style (incline BP, close grip PR, landmine PR, Floor Press, etc.) have you tried?