I want to smoke several racks (about four) of pork spareribs this next weekend. I am afraid that the ribs might slip off of the hooks that came with my model 50 oven and let the ribs pile up at the bottom. Is there a proper way to set them up (i.e., double up the hooks)? Sorry to be a pest, but even though I've owned my oven for awhile, it's been used less than six times. Thanks for your input!