So I am ready to try some ribs, but I accidentally bought two different cuts. I have two packages of back ribs at about 3 lbs each and one package of spare ribs which is about 6.5 lbs. I want to have them both ready for dinner tomorrow. Should I start the larger cut earlier? About how much time will they all take. I know I need to cook to temperature, but I need to estimate my start time. Thanks!