I couldn't ever really wrap my head around a turret press, still need shellholders, buying extra turrets , storage space. I like working up a few different bullets for a given gun, using different dies for certain purposes, and having two guns in a given cartridge isn't unusual. the idea of just turning the turret for the next die being faster is a moot point up against a Co-Ax, waited 30 yrs to buy one, I probably shud have bought it when I started out 40+ yrs ago. I still would have needed a different press for a couple of cartridges I've had, but, there are also a few things that are just easier to do on an O-frame for access reasons, and jaw limitations, on the Co-Ax, some instances of a tool not fitting in it as well. Lots of things in this game you don't know about, until you try it out.