So ive been eyeing a masterbuilt smoker for months and my family got me a 40" for fathers day so ive been looking at videos and researching what to cook but ive seen people add chips every 30 mins all the way to every hour. Currently im looking for four pork spare ribs then ill trim and place each one on a rack and do a 3-2-1 on them @ 215 but im unsure on the first three hour smoke if i should add every 30 mins.