Also,
All in all, I am not sure if CV mode is even necessary for the backlash compensation to work. I was just following along with a post on CNCzone, and also the Mach3_CVSettings .pdf I stumbled upon. But is seems, like with Hoss's youtube video, it is simply a process of filling in the backlash window parameters and that's it.
BTW, running latest version of mach3, 066.
Pete