20BY mini direct Extruder

Very effective, mounted on 50x50mm heatsink with fan (cpu heatsink)

i have use on Kossel and Karya3D, print ABS, PLA on 0.25 nozzle to 0.8

For motor size, i test use motor with diameter 22mm and hole distance 30mm.
I think it should still work for motor with 24mm diameter and distance 31mm

I will make other motor too.