I have an existing GE Monogram model #ZGU661EM1WG that has seen better days. I'm thinking of replacing it with a KitchenAid model #KGCS166GSS. I don't want to buy another downdraft unit (this is a rental house) unless I have to, does anyone know if I can use the existing model #JXDV6601 downdraft with the proposed KitchenAid cooktop. Thanks!