I would like to know what the Lincoln option is for the Miller WC115A with contactor?I have always used Lincoln but have seen the Miller products for setting up a Spool Gun on a Engine Drive welding machine.I will order the Miller Spool Gun 30A and the Miller WC115A with contactor to have a way to weld aluminum in the field but would rather buy Lincoln.Does anyone know what the Lincoln option is?Thanks,Walter