Can I get the GBS grates for my 18" or 26" charcoal grill? The Gourmet BBQ System is currently only available for 22” charcoal models and the Summit Charcoal series. Related articles I heard it's not safe to use a grill brush with wire bristles. Where can I find the GBS grates for my Spirit 210/220? Should I cover my grill? Do you need the Gourmet BBQ system cooking grates to use the inserts?