I recently upgraded my Original Prusa Mk2 to Mk2S. After reassembly the x-axis will only travel in one direction. If I flip the connector over it will only travel in the opposite direction. I tried new cables and connectors. I switched stepper motors (tried three different motors-third party vendor, Prusa does not sell the steppers seperately.) I tried flashing the firmware to no avail. I evvon Spritegeezer - Mechanik