Tom,
Yep. Tried that, no joy.
But...between Gecko's troubleshooting video and an email from one of their support techs, my motors are moving again. Basically just took it apart, powered up the G540's motherboard (green!), added stuff back (stayed green!), and voila! Back to moving motors. No idea what changed, apart from takeapart and gradually reassemble, but it works. Wired the same, switches the same...ah, well...mysteries of life.
Anyway, back to the subject at hand...my A axis now works!
Using Modify to ADD a new axis did NOT work for me. I think I did indeed forget to specify XYZA (vs. XYZ) when I ran the wizard the second time, despite getting the pin mapping right later. Anyway, Modify did NOT let me advance to configuration for the "A" axis after selecting XYZA, and instead threw errors when I tried. I can post a picture of the error page, if someone wants it.
Gave it a couple of tries before giving up on that and just doing a fresh config, which worked fine.
So I think I'm through the all-axes-moving 'gate', and it's on to the next challenge - trying to do something useful with them!
Thanks again for your help with this!
- Bob