I have just finished assembling an Ender 3 printer. The extruder on the X-axis travels to the right-hand side and hammers against the stop when selecting Auto Hom. The extruder then positions at front right. I printed a fan cover and found that the ext "ender" was a mirror image which suggests that the X-axis motor is incorrectly wired. On the extruder motor and Z axis motors, the wires to the plugs are identical. That is wire 1 to plug 1, wire 2 to plug 4, wire 3 to plug 3 and wire 4 to plug 6. The X-axis motor is wired as follows: wire 1 to plug 1, wire 2 to plug 4, wire 3 to plug 3 and wire 4 to plug 3. This would appear to be wrong. One would assume all motors would use the same wiring protocol. Any suggestions gratefully appreciated. Ian