Prusa i2 is finally “ready” after many modifications.
couple examples:
E3D V6 hotend
Bowlen extruder
Graphic Display/control
Raspberry Pi 2 + Octoprint + Wlan
two stepper drivers (one each z motors)
belt tensioners y and x axle
better wiring + status led (hotend and hotbed)
Aluminium 4mm bed + induction sensor + auto mesh leveling
12v 200W silicon heat pad
Many upgrades parts different places.
Whole frame 10mm threaded rod (original 8mm)
Now everything works perfectly. That auto mesh leveling is awesome system. Thanks tips and videos to @Thomas_Sanladerer and many others.