Just bought this printer off my friend as he wasnt using it and I wanted one, he never used the left extruder, well I loaded the right made a few prints and wanted to start making some dual color/type prints and when Iselect the left extruder ot brings just off the edge of the right side of thprint bed, tried moving the print in rep g to the far left and it still prints in thesaem spot, anyone know how to correct this?