George,I don't have a rotisserie for my Genesis,but the ECB I had before had a dedicated roti burner. I was gonna do a chicken one night,and because of the several suds I'd had,forgot how to light the roti burner(it kept going out!) So,I just used the two outside burners and the chicken turned out nicely! So,it's not absolutely neccessary. In fact,the Genesis I have doesn't have a roti burner,but a roti is available. HTH