I had a question about the LeBlond heavy duty series of lathes that I cannot seem to get a handle on. Was hoping to get a clearer picture if someone here can help out. I was wondering what the distinction was between models like the NK, NI, NFL, etc. I am referring to the final generation of the manual “super lathes”. Obviously they were all built like brick S#*@ houses, but what separated them? I assume one was a sliding bed model, but that is just a guess. Have done some digging around but maybe I missed it.