for those of you who use the beer can method, do you simply set the bird on a beer can and leave it or do you buy a beer can holder? Last year I set my two turkeys on a beer can. one fell over during the process. I found a beer can holder on amazon for $6.99 that says its good for a 4 lb chicken. My turkeys will be 15 lbs but i WOuld think the holder would help keep it upright. Opinions?