I was one of the early supporters of Dillion reloading equipment. Not because of any science or intelligence I was simply a young competitive shooter and could not afford anything else. They had/do have great customer service. My first Blue press the head was not removable and you had to spin the RCBS lock rings on your lathe to get them to fit with each other. Changeovers were a total PITA, circa 79 maybe? Wish I still had that press, it was cutting edge at the time, very innovative.