My configuration and customization of -- https://toms3d.org/2017/02/23/building-cheapest-possible-prusa-i3-mk2/ using various Marlin version. I update Marlin as I go.
- ramps-1.4 -- original ramps-based system using DRV8825 steppers in a 12V system
- mks-gen-1.4 -- a system based on mks-gen with A4988 powered in a 24V system
Both configurations are set to use M8 rods with 1.25mm pitch instead of M5 rods with 0.8mm pitch
Z build volume is limited to 180mm.