I ran a Trimble FMD for several years in an MX240 that I no longer have.  My Magnum 275 came autosteer ready, so I added a 372 and a Pro 700.  While the Pro 700 works great on A-B lines, I miss one feature of the FMD.  I could go along the fence and if I didn’t like my B point, I could hit B until I saved that line.  I could save it at the headlands and continue to the next headland.  I only have a Pro 600 manual and keep forgetting to look to see if I can do this with a different type setting in the Pro 700.