It looks good! And certainly each machine you do gets better
A few questions:
I know a Smooth Stepper must be in there, but can't see it...?
Also, since you have all those buttons and particularly the FRO and SRO pots, I would assume a Pokeys should be in there, but can't see that one either.
Could you explain what are the buttons on the first raw at the top? SpinEn looks like enabling the spindle drive, but I would expect a On/Off switch and this looks like a momentary switch? And the other two, just curious what are they (Limit and Control)?
Oh... and does Russ sell those relay boards? Where can I acquire one?