Mine is kind of different. It is a rolling plotter setup with one axis being essentially infinite. I was using klipper firmware before on a MKS 8 bit board. I redefined the G10 & G11 gcode to do a servo down & servo up for the Z-axis & was kind of a pain since I had to manually edit Gcode. This time around I was going to use a standard small stepper of some sort, but if the fluidnc works to use the servo with a z-axis, I might stay with the servo. Here is my design as it looked 2 years ago. I am in the process of redesigning it now. Rolling Plotter build - Random or Off Topic - V1 Engineering Forum