alright here's my question.... I have a 15lb tank and used it for about 6 hours running my GOSM to smoke some ribs. I'm gonna be putting some butts on in the morning and don't know if what i have will get me through. my butts are about 7lbs each. I only have one tank, so do i need to try and get another one or do you think this one will do it for this smoke?? i'm worried it won't but have no experience with propane at all. thanks for your help!! Need to know what to do asap bc if i need another i need to move now.