I ran a build setup on a 1250 the other day because someone on this site said that you can no longer order one without the pro-600 and it appears that is the way it is. Last winter/spring you could option one without it. I'm not sure what it is right now that would encourage anyone to use a 600 for anyhow. It isn't a full Isobus monitor, and the options are limited even using CNH equipment.